Chapter 1: The Place Where Things Got Wet

The initial conversation Twilight had had with Rarity was significantly less awkward than it otherwise could have been due to Pinkie giving Rarity a tipoff that Twilight would be arriving soon and what she was looking for. Rarity had greeted Twilight in her boutique with a look that somehow managed to combine sympathy for the embarrassment she knew Twilight to be facing and something almost sultry, which Twilight imagined Rarity reserved for ponies that came looking for the sort of outfits that a pony does not typically wear in public, assuming they wear anything at all.

Once it was firmly established that both ponies knew what the other knew it was right down to business for Rarity. Despite not being quite closing time Rarity was quick to turn the sign over her door around and draw down the window shades. Just as Twilight was beginning to get comfortable with the situation she found herself in; that of casually discussing what makes for an enjoyable to wear and even use quality diaper with one of her oldest friends, Rarity had brought out a small trunk from the back storeroom and proceeded to open it revealing over two dozen different varieties of disposable diapers she had custom made for various clients over the years. No wonder Rarity’s name had gotten around in certain circles Twilight thought. There probably isn’t a single high society diaper-wearing pony in all of Equestria who hasn’t at least heard of Rarity and her work at this point. Though the diapers were technically disposable in nature Twilight had a hard time with the idea of ‘disposing’ of any of them no matter how well used they might become, they just all looked so lovely.

Twilight couldn’t help but notice that most of the diapers had custom designs printed on the plastic in front. Some of the designs made Twilight blush and brought up certain feelings which unless quickly dispelled would only further the emotional difficulty of the situation. Others seemed to be made to look as cute as possible with little images of fillies or various animals printed on them. Still others had images of particular ponies on the front. Whether that was supposed to be the pony who would be wearing the diaper or more likely in Twilight’s opinion the pony that another pony wanted to have on their diaper was not revealed. Rarity didn't bother taking measurements of Twilight as she had gotten thoes on file nearly the day the two of them had met but she did immediately start pulling out a selection of the diapers she thought would have the best size matches and characteristics.

It soon became apparent to Twilight that the next step would be to start trying on some of these selected diapers if her past experience with choosing any type of garment from the Carousel Boutique was much of a guide. Despite this it still came as a bit of a shock when Rarity had asked Twilight quite directly,

“So would you like to slip these on yourself or would you like me to do the fitting?”

While an admittedly very cute light violet colored diaper hung in the air suspended in Rarity’s magic field. Twilight decided it likely that Rarity had chosen it for the way its color complemented her fur.

And was that an image of the famous Canterlot supermodel Flur-de-lies printed on the front plastic?

“Ah, um, well I guess I should…” Twilight started

“Oh don’t bother yourself dear, here let me do it.” Rarity cut in. “I’m hardly a novice. I still help Sweetie Belle with her diapers from time to time after all.”

“Wait, Sweetie Belle wears-“

“Yes, at night, to bed. Though to be honest I don't think she is really wetting the bed anymore. I’m becoming suspicious she simply enjoys them...” Said Rarity looking off to the side at nothing. Twilight couldn’t help noticing that Rarity was smiling faintly as she said this.

“Ah, Goodness me I do apologize, here I am going on about my sister and ignoring the client right in front of me! How unprofessional! Here, lets get you up on a standing bar, it will make things easier for both of us”

Twilight was ushered through to one of the smaller back rooms where an upside down T-shaped metal bar was attached to the celling. It was a standard feature found in nearly any professional fitting room and allowed a pony to stand on only their back legs for extended periods with their forelegs hooked over the bar. This allowed the pony doing the fitting better access to the client’s chest and hip area, which would normally be difficult to work on while fitting a dress for example. Twilight noted it would appear that the device could also be used to properly fit a diaper, not something she had considered before. Of course- leave it to Rarity to turn what was a swift and often unpleasant chore with a foal into a work of care and diligence in Twilight’s case.

Her face heating up under her fur from embarrassment Twilight stood on her back legs which she spread apart and raised her tail. Not exactly the same set of movements a pony would make for a simple dress fitting Twilight considered. Really more like a mare preparing to have…no… no, best not think on that too much! Twilight did the best she could under the circumstances to not let her body’s instinctive reaction to her present posture become obvious.

Despite her efforts she couldn’t prevent a slight “mmmm…” from escaping, as the thick soft diaper was pulled tight between her back legs and around her hips partially covering her cutie mark. More strange still was the sensation of another pony’s telekinesis having a hold on her tail and keeping it in the proper position while it was being pulled through the tail hole in back. As Rarity’s magic pulled the tapes tight across her waist Twilight was again reminded how wonderful it was to be wearing a thick diaper and now being able to do so around a good friend made her all the more pleasantly aware of her state of dress so to speak.

“Oh, my, Twilight.” Rarity said with honest excitement. “Thoes really do look wonderful on you, and you look wonderful in them. I’m so grateful you came to me for help with this matter, I can’t bear the thought of a beautiful mare, not to mention princess, such as yourself making do with anything less than the best.”

Twilight did have to admit that these were perhaps the best diapers she had ever worn, even better than the admittedly quite nice ones princess Cadance had secretly supplied her with during her days as a filly in Canterlot and Celestia’s personal student. With her years of experience Twilight could tell many things at a glance. The four tapes on the front obviously were well secured and would stay that way indefinitely. They were even colored to match the rest of the diaper. The outer covering of the diaper was of a thicker plastic than what would be found on an average brand meaning it wouldn’t tear or deform if the tapes were readjusted or reapplied, a problem she had encountered before to her annoyance.

Furthermore the padding was not only thick but dense, meaning it was packed in solidly. A very important indication of quality that meant the padding would not break apart, and or clump together even after being used for an extended period. This would help the diaper keep its shape and prevent leaks. Twilight was also very pleased to see that the padding covered more than just her backside but extended around her waist in the side panels as well, which not only improved the visual appearance of the diaper but also meant that a pony could use the diaper while laying on their side without fear of leaks, again a common issue with cheaper mass produced brands.

Though it wasn’t just the build quality that impressed Twilight, there were several minor but obviously custom designed touches, which would never be found in a commercial brand. For instance, there was a cute little purple decorative looping line printed along the leg guards and another print of small pink hearts along the top of the waistband. Not to mention the still obvious image of Flur the supermodel adorning the front.

“Well Twilight, what do you think? “I do hope you like it?” Asked Rarity hopefully.

“I, I love them. Um, Thank you…these, um…" Twilight was having a hard time knowing quite what to say as embarrassment began to reassert itself.

“Here darling, have a walk around a bit.” Suggested Rarity pointing back out into the main central room of the boutique in an attempt to distract Twilight enough so that she wouldn’t feel as uncomfortable about the situation.

Seeing as how this suggestion only served to make Twilight more self conscious Rarity decided to take slightly more drastic measures.

“I’m sorry Twilight of course this is embarrassing for you. Here, would it make you feel better if I wore a diaper myself?” Inquired Rarity with a touch of hopefulness intruding into her voice.

“Wha- but you don’t… what I mean is you don’t have to, just for me. Unless of course you, well, want too…”

Oh, Twilight dear”, Rarity said laughing. “You don’t think that I would be able to not wear these at least a few times after spending the last few years making them for other ponies do you? Besides it would be unprofessional of me to sell any sort of clothing that I make without using myself as a test subject first you see.”

“I- yes, that makes sense. It’s just that, well from you its…”

“It’s strange that such an otherwise fashionable, prim and proper pony such as myself would ever think of wearing a garment meant for ‘doing ones business’ in?” Rarity asked with a smile.

“Of course I understand Twilight, but you should be used to the idea that ponies aren't as simple as they might at first appear and even after knowing one for years they may yet surprise you! After all even I can’t be perfect all the time.”

“I’m sorry Rarity, I didn't-”

“Oh, bah! You don’t have to apologize to me! Here, if you want to make me happy go on out there and show me how a confident - not at all embarrassed – Princess of Equestria makes that diaper look.”

Twilight couldn’t help noticing how in the time it had taken Rarity to restore Twilights confidence she had not only picked out, but also put on, a diaper. Not something that could be done so quickly by a pony inexperienced with the process, making Twilight wonder just how many diapers worn constituted “a few times” in Rarity’s case.

As Twilight, confidence at least partially restored, turned to lead the way out of the fitting room she couldn’t help but notice the diaper Rarity had chosen for herself. It was every bit as well made as the one she now wore but the details were all different. For one thing the plastic was a pure white except for a pair of dark purple wavy lines parallel to each other running from near the top of the front of the diaper and disappearing back between Rarity’s legs, fancy wetness indicators? Twilight thought, how very…Rarity, if so. And what appeared to be a thin silver chain was tied loosely around the waist of the diaper. It was almost as if Rarity had designed a diaper for herself.

Twilight was hardly the type of pony to stride down a runway at a fashion show; she simply lacked the grace for that sort of thing. But for Rarity’s sake she tried her best to walk proudly even if she didn’t exactly feel it inside and showed herself off in as many angles as she could think of without making a fool of herself, or so she hoped at least.

However despite her initial reservations Twilight did enjoy herself. Really, how could she not when wearing a diaper as nice as this one. It hugged her lower waist very securely but not so tight as to be uncomfortable. The thicker plastic had no sharp corners that would dig into her fur and become itchy. And the diaper’s thick bulk between her legs was more than enough to press against her inner thighs so that with every step she took thoes areas rubbed over the smooth outer plastic making each stride give her a bit of a thrill. Though at the same time the diaper never seemed excessively bulky or out of proportion to her body. There was one oddity though.

“Ah, Rarity I’ve been meaning to ask” Twilight said turning to face Rarity who was still standing watching Twilight and her diaper with an appraising but also quite pleased look.

“It feels as though the plastic covering runs around to the inside of the diaper as well. It doesn’t reach all the way down to, um, down to that specific area and I can feel the plastic covering the inside of the back of the diaper as well again. Um, why…”

“Yes, that” Rarity said in a way that told Twilight she was hunting for some way to explain it all that would make good sense.

“The mare that ordered the set of diapers the one you are currently wearing came from was very…experienced with diapers and knew exactly what she wanted. She said that having as much of the inside of the diaper be covered in the same plastic as the exterior as could be achieved without interfering with its absorbency helps the diaper to maintain its proper shape over longer periods of time. She also explained that it keeps more of the chest fur nearer the navel from coming into contact with any wetness when the diaper is used and makes clean up afterward an easier process. Furthermore she simply though they felt better that way as the inner plastic allows the fur to slide around more easily when walking or even running.”

“Well that was a more complete explanation than I expected, that mare, whoever she is, sure sounds like an expert! I would love to meet her some day.”

“Oh you probably have already Twilight, but I’m sure you will get another chance at some point.” Rarity replied somewhat mischievously.

“I’m surprised how well thoes diapers happen to work on you, I mean, I made the best selection I could but even I didn’t expect… Well this does make things much easier! We can immediately begin with what you are wearing as the template and get to work right away! I promise you Twilight that when we are done you will have a set of the best diapers anypony could possibly wish for!” Rarity exclaimed. Why, diapers for a princess, I never would have thought…” Rarity trailed off growing oddly wistful.

Twilight could see she was in for a longer stay at the boutique than she had initially planed on. After all, when Rarity said she would start right away on something that is precisely what she did. And that was the problem at the moment because Twilight was beginning to need to use the bathroom quite badly. In fact she had begun to feel it before coming to the boutique in the first place but in her desire to hasten her arrival she had ignored the feeling and perhaps it was true that subconsciously knowing she was going somewhere that perhaps had diapers on hoof that she might be able to use... well, she had not directly considered the possibility and when the diapers turned out to be so fancy and well made she had dismissed it entirely. Seeing as how the possibility of returning home in a timely manner before she lost control was now beyond possible –short of teleportation which was a risky undertaking without being able to directly see one’s exact destination – she concluded that the only choice would be to ask Rarity to go upstairs and use the bathroom here in the boutique. Turning to Rarity Twilight couldn’t help but feel a bit sheepish but asked anyway.

“Rarity, I want to get started on the new diapers as quickly as possible as well but first I need to use the restroom, um, I guess you can put the diaper on me again when I come back down, sorry to make extra work for you though.”

Twilight paused at Rarity’s confused look. “What is it?” Asked Twilight.

“I don’t understand Twilight, you are wearing a diaper at the moment after all, is there something wrong with it?”

“Wrong with it? Of course not, I just, wait, Rarity! Twilight started with a bit of a shock as she understood Rarity's implication, “This diaper is so beautiful and unique. Besides its not even really mine is it. I can’t well, just... go in it right?”

“Oh Twilight darling,” Rarity said expression softening into a warm smile, that diaper was yours the moment I put it on you. And as for it being unique, pah! That one is simply one of hundreds I had made for the customer, probably thousands by now actually, she still orders more each month. I just keep a hoof full around as samples or for design inspiration if I need it. Don’t you worry, there are more where that came from and anyway the ones I will make for you will be every bit as good if not better!”

“After all Twilight, really, what is the point of a diaper if its not used for its intended purpose? So you see,” Rarity said walking over and pressing a hoof gently into the side of Twilights diaper, “there is no reason for you to go and use a another bathroom when you are already wearing one.”

“I- really, its ok? Thousands you said?”

“Yes Twilight, thousands” Rarity said with a comforting smile. “And if it helps I’ll use my diaper if you go in yours.” Said Rarity with surprising eagerness.

Again Twilight was a bit at a loss for words, Rarity? Using a diaper? What was the world coming to?

Twilight gave Rarity a semi-suspicious look. “You’re not a changeling are you?”

“Oh for Celestia’s sake Twilight! If you need to go then just go, you don't need my permission, Princess. Rarity said putting special emphases on Twilight’s title.

“And Twilight, I do have one rule, if you are going to use one of the diapers I made I insist that you enjoy it as much as possible!”

“Heh, thanks, I’ll keep that in mind” Twilight said laughing nervously.

“Where- I guess here, right? Here is good?”

“Where ever you like darling, its your choice. Though I do hope you don’t mind if I watch, do you?” Inquired Rarity hopefully.

“Oh, um no, of course not, you’re always welcome to watch, I mean its your place I can’t just send you off or something hehe.”

Part of Twilight really couldn’t believe she was about to actually go through with this. After all as recently as last week she had had no idea that her friend whom she had known since the day she had moved to Ponyville even knew that a grown mare could enjoy diapers let alone wear them herself. However, she considered perhaps it was only a matter of time before ponies with similar interests wound up getting to know each other. The other part of Twilight was really only concerned with one thing, the act of relieving herself of a certain uncomfortable pressure. And it was this part that won out over her weakening desire to find any way to delay the inevitable. There was no way out of it now. Anything less than a complete soaking would be rude to Rarity and Twilight was not that kind of pony.

With a quiet intake of breath that sealed her commitment Twilight turned so that her backside was facing Rarity and raised her tail somewhat to provide her with a less obstructed view. She shuffled a bit out of nervousness and spread her back legs slightly. Then with a nearly inaudible sigh she let her muscles release their bind around her urethra.

The results were not as immediate as Twilight was accustomed to considering the pressure she felt but as she forced her body to get used to the idea that yes, she really did intend to go here and now her natural processes took over and the trickle became a torrent which she no longer had any desire to stop.

At first the force of her urine entering the diaper caused it to splash back onto her sensitive places, covering her lower lips and more in a wonderfully warm liquid. Beyond that though it soaked into her fur making her sensitive skin come alive with spreading warmth that just couldn’t be achieved in any other way except perhaps a soak in a hot spring bath. Her strong stream continued its playful splashing into her diaper with an audible and distinct hissing sound as Twilight could feel the increasingly soaked padding pressing more firmly against the inside of her legs as it expanded quickly to accommodate the sudden influx of fluid. The warmth of the thick, tight diaper pressing itself against her from all directions was nearly more than she could take without rubbing herself like a mare in heat. She still was able to maintain enough dignity to keep from doing that, for the moment at least.

It felt like she had been peeing forever. Truthfully, probably only a minute or two but time seemed to slow down as the flow just kept on coming and the diaper gradually expanded and grew noticeably heavier. It didn’t require much though for the once dry diaper to take on the distinctive feel of a well used one to Twilight. The amount of pee flowing out of her would have made for at least two good diaper wettings under normal circumstances so she was thankful for all the excess since the diaper she was taped into had more capacity than what she had worn in the past. Somehow she felt it would have been a terrible waste to have only gone a little or even a moderate amount in this diaper. A diaper of this quality should be used to its maximum potential and nothing less.

By the time her powerful flow finally trickled to a stop she had all but forgotten she where she was and that she had an audience of any sort. Her head was bowed low as she had let every muscle in her body relax save for thoes one currently holding her upright. Incidentally this allowed her to look under herself and examine the diaper. Due to the thick violet tinted plastic covering, not to mention the large print on the front of the diaper it was hard to tell she had wet at all just by looking at the color, perhaps it was a bit darker than before but the more obvious indication of a heavily used diaper was the way the front of the diaper bulged out even further than it had while dry. Twilight was pleased though unsurprised to see no signs of leakage anywhere, the diaper was doing its job well, it was holding in more pee than any standard diaper could be expected to without at least a little leaking. Though what did surprise Twilight was that the diaper was doing all this with out any apparent sagging at all. Despite the noticeably increased weight of the soaked padding the diaper was taped just as tightly and securely around her body as it had been since the moment Rarity had put it on her. And soaked it was, she could feel the warmth all the way from where the front of the diaper ended just below her navel to up underneath the base of her tail.

Twilight found she couldn’t resist curling a foreleg underneath herself to slide the tip of her hoof gently over the smooth plastic while pressing in slightly here and there to test the consistency of the padding. Although the wet thickness of the diaper prevented her touch from being directly transmitted through to her now rather sensitive crotch just the feeling of gliding her hoof gently up and down the front of her diaper was enough to get a quiet moan out of her.

It was however at this point that Twilight noticed that not only had Rarity moved herself closer, but also that Rarity was apparently doing the same thing to the front of her diaper as what Twilight had been getting up to. Twilight quickly lowered her hoof - although she tried to make it look like she wasn’t trying to do so too quickly- feeling her cheeks grow hot.

“Oh my, Twilight.” Rarity said breaking her eyes away from Twilight’s bulging diaper.

“I do believe that just may have been the most beautiful thing I have ever seen you or any pony do!” I’m so honored to get to make diapers for a mare who can appreciate them so much, really I am!”

“That's so sweet of you Rarity, thank you.” Said Twilight turning to nuzzle her friend.”

Despite being momentarily distracted by Rarity’s emotional outpouring Twilight couldn’t help remember a certain promise from the white mare.

“Well, since I’ve used mine that means that you will- I mean you said that you’d-“ Twilight said struggling with the proper way to broach the subject.

“Well yes, about that hehe, I think I may have um, done my business, already, just now, while watching you, so to speak.” Rarity got out awkwardly. “I must admit it does feel really quite nice.”

Rarity turned around showing her that her once pristine white diaper was now noticeably darker with a slight yellowish cast to it that covered most of her backside and well up the front Twilight was sure. Rarity must have been telling the truth about how it felt as when she pressed a hoof tip into the center of her diaper Twilight could see her body visibly shiver. Twilight wasn’t sure why but the sight of such an otherwise well kept pony wearing a rather fancy diaper, silver waist chain and all so thoroughly enjoying a very obvious wetting in her diaper was all rather exciting. Her actions were just so wonderfully juxtaposed with her appearance and public reputation.

“Oh my, it has been too long since last I did this. Thank you Twilight for coming over today, I wouldn’t have been able to be having nearly as wondrous a time without you!”

Before Twilight could respond Rarity went on.

“Silly me, this is about you dear, here now, walk around a bit, do some stretches, just move about like that diaper is the most normal thing in the world. I want to be sure that the diaper is perfectly comfortable for you no matter what you do while wearing it. Nothing less is acceptable.”

“Um, ok” Twilight said trying to decide just what constituted a bit of a walk. She settled on simply striding around the room while trying to walk as normally as possible. This proved a bit difficult, not due to any true physical limitations the thick wet diaper imposed but simply because of the novelty of the sensations its heavy warm padding and the tight smooth cool plastic produced as they stretched and slid around her legs and the very receptive areas to be found under her tail. Altogether it really was enough to drive a pony to distraction.

Chapter 2: The Place Where Things Got Messy

Rarity continued to gaze intently at Twilight as the young Alicorn strode about her shop alternatively stretching this leg or that and at intervals raising her front half by putting her fore hooves up on a countertop or table. The more she watched Twilight the more enamored with her good friend’s amazing diapered figure in action she became. It was as though the young princess had been born for diapers. Of course all foals started out life in them but only a select few could keep on growing into adults all the while being able to look every bit as cute in them. And here just about the best example she could have hoped for has waltzed right into her place of business!

Eventually the pressure of Rarity’s hoof rubbing up and down over the smooth white plastic and heavily soaked padding between her back legs became strong enough to register to her conscious mind. With a slight sense of regret she lowered her hoof and motioned Twilight over.

"Thank you for that lovely demonstration Twilight! I think I’ve gotten a good enough idea of where to start.” Come, come, Rarity motioned for Twilight to follow her into a different back room separate from the fitting room.

“As I believe I mentioned before the diapers you have on now are a wonderful place to start. If we are lucky all that will be required is to reuse the basic pattern but with your exact measurements and a new color/design scheme and I should be able to start producing the first examples for you to try on! This is so exciting Twilight! Why, perhaps I might even be able to begin producing a ‘Princess’ line of diapers for select customers and- ahem, well, with your permission of course Twilight”, ended Rarity a bit sheepish from her over enthusiasm.

“No, that does sounds like fun, but one thing at a time. I’m still getting used to the idea that you know I like diapers, I’m not sure how I’d feel about too many more ponies figuring out the same thing quite yet.”

“Yes, of course Twilight, my customer’s privacy is of the utmost importance! I wouldn’t still be in business today if I couldn’t maintain confidentiality.”

“Here we go Twilight.” Rarity said when they got to Rarity’s work desk, which was covered in various types of fabric and patterns in various states of assembly towards their ultimate destination as parts of dresses and other outfits. There were also a number of catalogues and notebooks full of sketches of Rarity’s own design piled here and there. However the catalogue that Rarity pulled out from a small draw near the bottom of a nearby desk was not associated with any of the obvious categories of publications. It was also not as large and possessing of a flashy front cover as many. In fact it had no cover image at all, simply a small black lettered title of ‘Absorbent Undergarments’ was printed on a light blue background.

“This little book here is of my own publication I’m proud to say, and has a certain circulation among certain ponies of similar interests across Equestria.”

Twilight stared at it eagerly as Rarity placed it in front of the Alicorn and opened it to the first page of listed items. The book was essentially a diaper catalogue but calling it that alone would be an injustice. There were dozens of carefully drawn overall similar yet slightly different diaper outline patterns to choose from but each one had a carefully compiled list of dozens of suggested additions and modifications to the point where thousands of possibilities could be dreamed up through mixing and matching. Some of the concepts included diapers that could be made with the wearer’s cutie mark printed on the side. A pony could have any image they wanted printed anywhere they wanted really. There were options for custom decorative accessories one of which was the very silver chain around the waste of the diaper she was currently in. You could get a diaper that had the plastic around the waste cut to form belt loops and of course there was a listing of moisture proof plastic belts that could be ordered. It was possible to order a diaper that only had a standard plastic covering on the outside or the plastic could come partially around into the inside of the diaper such as the on the one Twilight was currently in. There was even an option for a diaper that was completely covered in plastic inside and outside, though the practicality of that was questionable. Regardless, the lists went on. Rarity was quite proud of her work in this booklet She had had great fun putting it together.

“Wow Rarity! This is amazing! Gushed Twilight. I had no idea there were so many options! Who makes this book and where can I get my own?”

“Oh its just one of thoes compilations sourced from various places…” Said Rarity skirting around the issue. “I am certain I should be able to get my hooves on another copy soon and I will be sure to immediately bring it to you.”

Rarity wasn’t quite ready to explain to Twilight that she was so heavily involved in the production of boutique diapers distributed across the country.

“Thank you! I’d love that if you could do it.” Twilight said turning back to the catalogue.

As Twilight re-immersed herself in the contents of the listings mumbling mental notes to herself as she read, she made a slight fidgeting motion and lowered her tail slightly. These motions would have passed by unnoticed to the average pony but to Rarity’s eye, trained on years of dealing with Sweetie Belle in diapers they spoke quite clearly about what Twilight must be feeling.

Twilight must be needing to use the bathroom again and this time not just to wet! Thought Rarity. As it happened Rarity had been dealing with a growing pressure in her backside for some time now but had been resisting the temptation as she wanted to wait for the most opportune moment. It appeared that such a moment had arrived. Rarity wanted to make Twilight feel as comfortable and free to do as she wished in her diapers around her and Rarity had decided that the best way to do so would be to lead by example.

“Here Twilight, I don't want you to feel rushed.” Rarity said dragging over a chair with her magic. “Have a seat and take your time. I need to organize a few things in the fitting room before opening tomorrow. I’ll be back in a few minutes to check on you.”

“Ok, thanks Rarity.” Twilight said distractedly while settling herself onto the provided chair, diaper giving off a faint crinkling sound as Twilight’s weight settled down onto it.

Rarity Smiled at the violet alicorn, give that mare a book and she’ll forget the rest if the world exists. It really was an endearing trait.

Now, thought Rarity, to go through with my plan. Rarity left Twilight in deep thought over her new wealth of options and hurried back across the showroom to the fitting room where they had started. Rarity closed and locked the door upon entering despite the fact that she felt she might well not hear from Twilight for over an hour if left alone. However Rarity was simply a cautious mare and didn't want to worry about the chance of interruptions that would upset the delicate timing of her plans.

First though Rarity couldn’t help but go over to the nearest mirror leaning against the far wall and admire herself in the diaper a bit. She was pleased to see that despite being well used and moved about in for a little while there was absolutely no sign of the padding coming apart or of the diaper becoming looser in any way. She really did love how she looked with the extra thick slightly discolored bulk of the wet diaper being put on display so proudly. Her waist chain glinted softly in the light from the single ceiling bulb, as it was dark outside now with the Sun having set an hour ago. It had been a strange series of fortuitous events that had led her down the path towards loving diapers but she couldn’t be happier that it had turned out in the way it did. It added a great spark of excitement in her professional life that she felt she would probably be lacking otherwise.

The period of self admiration had to come to an end though, Rarity wasn’t sure how much time she had to waste and the sooner she could get back to Twilight the better. Well, Rarity, she thought to herself I don't think there will be much going back for you if you do this but we’re in so deep already…might as well. And anyway if nothing else it will at least feel good.

So with a deep breath of commitment she relaxed her muscles and did what nopony with even passing knowledge of Rarity would think she would ever do. Rarity began to mess her already soaked diaper.

Due to having held it in for so long it all rather came out in a rush. Rarity was quite glad of this really, she hated having to strain or push. Such behavior was so un-lady like after all. Rarity moaned quietly as the unusually large quantity of slick squishy poop spread out over her private regions and up below her tail. The thickness and tightness prevented the diaper from obviously bulging out the way a cheap diaper would have under the same circumstances.

It was all over in a matter of seconds but it didn't take long to make a huge change in how the diaper felt. Now a thick spreading pile of hot messy poop overshadowed the warm wetness caressing her between the legs and around her back and hips. Its presence seemed to distract from all her other feelings.

As good as it felt however there was one simple option available that could make it much better. Rarity picked out a spot on the floor covered by a soft rubber mat normally used to protect the finish from stools and mannequins and the like being dragged about. Rarity stepped over to her chosen location and gently lowered herself down directly onto the seat of her diaper. The feeling of the hot mass of poop immediately spreading in all directions within her diaper was simply divine. The majority of it went all over the back of the diaper though the base of her tail limited this upward migration. A good amount though quickly squished its way forward coating her privates in its slick warm embrace. Rarity couldn’t resist squealing just a bit at this wonderful sensation. Immediately she pressed a hoof into the center of her diaper squishing the mess in even more thoroughly. Rarity could never quite get over her surprise that something so disgusting could feel so wonderful at the same time. A bit more quick rocking around on her backside making sure the sticky mass was coating as much of her rear and crotch as she could manage in a limited amount of time finished up her clandestine fitting room activities. It was now time to return to Twilight and hope and pray that her timing and ability to read a pony’s emotions were still accurate.

Rarity’s walk back to where Twilight was still engrossed in her newfound book of options was short but wonderful. With each step she took the goopy mess coating her from tail dock to halfway between her privates and navel alternately pulled away from or squished into her normally immaculately cared for soft white fur. The sensations constantly changing depending on how her stride stretched the plastic of her diaper. One of the best things about being in a very high quality diaper was that as filthy as she was the same well designed leak guards and general tightness of the fastening tapes nearly entirely prevented any smell from getting out. Of course no diaper can be perfect in such regards and if she stood in place for long enough she would surely begin to smell herself. As long as she moved around now and again however things should be fine. Anyway if all went to plan she wouldn’t have to hide her deed for long.

Upon entering the workroom Rarity was immediately encouraged to see Twilight squirming around a bit on her seat though she persisted in looking through the listing of available diapers and associated options.

“So!” Rarity called from near the doorway. “What have you come up with?”

This time Twilight did look up from her research.

“Oh, I think I’ve settled on some options but I want your opinion on some others.”

“Really?” Rarity said walking over closer to Twilight. “What are you interested in?”

“I’d really love to go over these with you but um…” Twilight trailed off

“But what?” Rarity asked, although she was already sure of the answer.

“Well, I need to use the bathroom again-“ Twilight started.

“Twilight dear, I thought we already had this discussion, you are welcome to use your diaper whenever and wherever you want to.”

“I know, but this time I uh, I have to do more than just pee.” Twilight said her ears folding back in embarrassment.

Bingo! Though Rarity.

“Twilight, Twilight… just how strict of a mare do you think I am?”

Rarity now walked all the way around the chair to stand in front of Twilight. Without saying a word Rarity turned so her left side was facing Twilight whereupon she lifted her back left leg in such a way that Twilight should be easily able to see the brown stain that ought to be visible behind the leak guard. Twilight’s initial expression of confusion lingered long enough that Rarity nearly gave up and told Twilight outright but just before the moment got awkward enough for such direct measures Twilights expression changed to one of surprise and even perhaps a bit of shock.

“Rarity! You- you’re messy! Twilight exclaimed.

Satisfied with Twilight’s reaction Rarity lowered her leg and turned around to walk to where Twilight was sitting where she proceeded to plop herself down nearly on top of Twilight in the same chair. They were so close now that their sides were touching.

“Yes, Twilight I am. Very messy in fact.” Rarity said in a comforting voice.

“Its what diapers are for after all, and I see no reason why you should have to resist your body’s urges when I don’t.”

“But Rarity I-“ Twilight started looking first at Rarity’s swollen diaper and then up at her face.

“I don’t understand, this isn’t like you Rarity”

“Twilight.” Rarity said in a soothing tone despite feeling rather nervous on the inside.

“I am behaving more in line with my personality than you seem to think. I’m not the only pony in Equestria who for business or personal reasons puts on an air of propriety and respectability while out in public, but who, when by themselves in private or with close friends, such as yourself, let their mane down so to speak in a major way. It can be hard trying to look and act perfect all the time and so when ponies like myself find a way to unwind we usually do so in a rather spectacular manner. I only wish you could have known about this side of me sooner so it would not come as quite a surprise.”

“And besides,” Rarity said lightening up. “You are an Alicorn Princess of Equestria! Perhaps not yet in full possession of the regal bearing a thousand years of steady rule brings but don't you think the average pony would be just as shocked if not more so to learn that you of all ponies liked to wear and use diapers as you do?"

“Well I- when you put it that way… I’m sorry Rarity I guess I never took the time to really learn what it must be like to be in your position, I know I sure get tired of all the Canterlot aristocracy thinking I need to act a certain way. It must be just as bad for you, your business success rides on your image after all.”

“I’m sorry I reacted the way I did, it’s just all a bit much to learn in one night. Perceptions are not easily changed I guess."

“No need to apologize dear, I suppose I’m somewhat to blame, after all I didn't exactly give you much warning about revealing my inner secrets did I!” Rarity laughed.

Rarity could see that Twilight was coming back to her usual happy self but with that came a return of a certain feeling which Rarity could surmise by the way Twilight glanced down at her pee swollen diaper and back up at Rarity.

“Um, so its really alright if I uh, go?” Twilight asked.

For a response Rarity leaned back in the chair and spread her legs exposing the slowly growing brown stains around the leg openings of her diaper. She then gave Twilight a pointed look as if to say ‘If I’m willing to do this myself do you really think I would be bothered if you did it?’

“Right then, Twilight said standing up. The Alicorn didn’t bother really going anywhere she simply stood there in place, spread her legs, hiked up her tail up, and with an audible exhale let her inhibitions and anal muscle control go.

The results were immediate and impressive, Twilights diaper slightly but rapidly expanded in back in much the same way that Rarity’s had only a bit more so. Rarity was transfixed by the sight of the heavily breathing Alicorn thoroughly mess her beautiful diapers. Flur would be so pleased to know a princess was enjoying the same diapers I made for her Rarity thought.

As Twilight brought a hoof around back to prod at the even more expanded rear of her diaper Rarity found herself sliding around in her mess by moving her butt about in small circles. A process guaranteed to coat almost any part of her under the diaper not yet already slathered in slick brown poop. As Rarity saw twilight looking at her she smiled at the other pony.

“Well, Twilight aren't you going to sit back down, I’m sure you would like to, why don't you try right there on the floor where you’re standing.” Rarity couldn’t quite manage to suppress a slight grin as she said these words. There was no way by now that even a pony like Twilight who was sometimes slow to grasp the details of social situations could not believe that Rarity didn't know exactly what Twilight wanted to do in her diapers and why.

With a hesitant grin of her own Twilight carefully lowered herself closer to the floor until with a sigh of pleasure Twilight came down on the huge mass in her diaper with her full weight. Rarity, a pony experienced in noting the finer details in things didn't fail to notice how Twilight had come down on the seat of her diaper while leaning quite a ways back. Doing so was a guaranteed way of making sure that most of the mess would be forced between her legs and right over her marehood as she sat up straight. Rarity wouldn’t be surprised if Twilight wound up with as much or more of her mess in the front of her diaper as in the back area below her tail.

This thought combined with her own slick mess coating about everything under her diaper and her constant motion nearly sent her over the edge right then and there. Fortunately she managed to calm herself down before things got really out of hoof and she made a fool of herself.

After an extended period of rocking back and forth in her beautifully designed and now thoroughly used diapers Twilight stood back up on all fours with a slight grunt and a rather silly smile on her face which spoke of a pony who had finally been able to do what she had secretly hoped for but never seriously considered would happen. Rarity couldn’t help but watch the front of Twilights diaper and try to determine for herself just how much poop was contained there. She knew Twilight’s mess must be coating just about every square inch of soft fur to be found under the diaper after all the rolling around Twilight had done in it but she wished she could determine specifics.

“Well Twilight, you certainty must be satisfied after that performance! Come, sit next to me and show me what you’ve decided on for your own diaper set.” Rarity considered herself fortunate to have had the foresight to have brought over a chair that had plastic-based cushions just in case.

“Oh of course, that.” Twilight said sheepishly.

Twilight came over and with an admirable lack of hesitation sat herself right down next to Rarity. The chair, while wide, was not necessarily designed for two ponies at once so Rarity found herself right up next to Twilight, shoulder fur brushing and diapered hips rubbing together. Rarity floated the design book over from where it had been temporarily forgotten on an end table and opened it up to the first page.

“And so? What were you thinking? Asked Rarity.

“I, I was thinking you know, what are diapers all about? They’re about comfort right, not just the way that they feel when tight around your back side and hips like they are hugging you but also the comfort of knowing that you can just go in them when you need to and you don't have to bother having to go to or find a bathroom. Its like they are your friends who are always there for you when you need them. And so I thought about who represented comfort to me the most when I was a filly. Well aside from my parents of course.”

“Hmm, let me guess” put in Rarity. “Princess Celestia, perhaps”

“R-right, that's- yes, Celestia was always there whenever I needed- well anything really, but especially in my studies. She was of course my teacher first, but more than that if I wanted extra practice on a spell or needed a study partner or I wanted something from the rare books archive she was always there for me. Plus on more than a few occasions she would let me use her private sitting room to study in. I loved it in there; it was so peaceful with a fire going on cold winter nights. And sometimes Celestia would come over and lay down next to me and we would, um, cuddle together."

“Anyway,” Twilight hurried on before Rarity could interject any questions hunting for juicy details about Twilights life as a filly in the Canterlot palace itself. “I just thought it would be somehow… fitting to wear a diaper designed with Princess Celestia in mind… That's not too weird right? You don’t think Celestia would be mad do you Rarity? Twilight asked with concern in her voice.

“Haha, oh Twilight, what you said is so touching, no I don’t think its weird and more than that I think Celestia would be honored and a bit amused that you thought so fondly of her that you would want to wear things based on her.” Rarity said putting a foreleg around Twilight’s waist and pressing her hoof into the side of Twilight diaper. She didn’t bother to remove her leg after the initial squeeze though.

“Why amused?” Twilight asked.

“Ah never mind I said that.” Rarity said quickly. “Just know that I’m positive there’s nothing wrong with what you want. So what specific qualities do you want the diaper to have?”

“Right, well, I was thinking that the diaper should mostly be white or perhaps a very pale pink like Celestia’s coat and maybe some gold trim, though not too much, around the top and leak guards.

“What a splendid idea.” Said Rarity beginning to rub her hoof around in circles along the smooth plastic of Twilight’s diapered hip right near where the Alicorn’s cutie mark poked out from under the diaper.

“Oh, and I thought it would be nice if the diaper tapes were colored based on Celestia’s mane, like the bottom two would be green and the top two would be blue or something like that” And also perhaps a colored line sketch of Celestia on the front, nothing too, um, over the top, but something subtle and elegant!”

“Twilight dear! That sounds simply gorgeous, I can’t wait to get working on it! Rarity’s hoof was now rubbing up and down the back of Twilight’s diaper and making circles around the base of her tail.

“Was there anything else you wanted to add?” Asked Rarity.

“I, uh, do like the interior plastic lining on the ones I’m wearing now, it makes it more slick, I guess is the right word, its easier to slide around in when um-“

“When your messy.” Rarity finished for Twilight.

“Yes, then” added Twilight. Now moving herself around a bit more in her diapers. Rarity took this opportunity to move her leg back around to her side of Twilight and began rubbing down along Twilight’s diaper between it and the inside of her leg.

“And just make sure the padding is packed in as well as it is in this diaper, that's probably the most important thing. Um, in the end”

“Of course, of course, oh, I’m sorry dear, was I distracting you, should I stop? Rarity asked her hoof now gliding up and down the front of Twilight’s bulging poopy diaper.

“Ah, no… no its, its fine” Twilight said spreading her legs open just a bit wider allowing Rarity’s hoof more freedom.

Having gotten verbal permission Rarity began to press her hoof deeper into the soaked padding overlying a deep layer of squishy poop coating everything between Twilight’s legs. The sensation of having another pony’s hoof press her squishy waste deeper into her marehood made her moan with pleasure.

“Wow Rarity, that feels-“ Twilight was abruptly cutoff as Rarity leaned over and kissed her full on the lips. Rarity could immediately tell from the way that Twilight hesitated and stiffened up slightly that Twilight was afraid that Rarity was interested in more than simply another mutual pleasuring session, which had occurred occasionally in the past though without diapers being a factor. Rarity could understand Twilight’s position. It would be a bit awkward for the Princess of Friendship to suddenly be in a committed relationship with a good friend to the exclusion of all her other friends. And as a general rule in pony society it was frowned on for an Alicorn, however rare they were. (Historically around one in one hundred million or so on average Rarity had read.) To go about getting into serious relationships with ponies that would not live even a twentieth as long (or less). Rarity immediately made it a point to correct this potential misunderstanding before it could disrupt her plans for the evening.

“Don’t worry dear Twilight.” Said Rarity releasing the Alicorn from her kiss.

“It’s not my intention to try and have you as mine, besides I don't think we would really get along that well over time.” I just want to do my best to make you feel like the Princess you are for tonight.” Rarity said while putting on her most disarming smile.

Thankfully Twilight visibly relaxed at this and as a very encouraging sign without a word leaned in and kissed Rarity back. This time neither pony saw reason to immediately break apart. It didn't take long for hooves to find sensitive diapered areas and between the kissing growing more passionate and the rubbing and pressing becoming more forceful the situation became rather heated.

“I would suggest,” panted Rarity finally pulling away from Twilight “that we move to a more comfortable location. I think that we will soon find this chair to be rather… limiting.”

“Yes I agree, um, more space.” Twilight said rising out of her sitting position. At first she looked around a bit confused.

“Where…?”

Rarity pointed a hoof up toward the celling with a look that said ‘where else?’

“Oh right! There!” “There sounds good!”

To Rarity’s surprise Twilight took the lead out to the stairs that led up to the small apartment which took up the second floor of the boutique. Rarity shook her head in amusement as she followed the unpredictable mare up the stairs.

The opportunity to watch Twilight go up two flights of stairs in a well-used diaper was not lost on Rarity. She spent the unfortunately brief trip nearly transfixed watching the shiny violet plastic of the diaper stretch in various exciting ways over the thick bulk of the soaked padding which itself was pulled tightly over a very messy but wonderfully toned muscular butt. Twilight’s butt, an Alicorn’s butt, one of the finest butts in Equestria and not only was it encased by a dirty diaper but it was hers for the night. Rarity also couldn’t help but pride herself on her efforts in having these diapers created. Even after a complete soaking, a huge messing, and a while spent being squished around in, the diaper had held onto its initial shape almost perfectly. A standard diaper would be noticeably sagging by now and the padding would probably be falling apart. No sign of either was to be found here. Only the slight discoloration and bulging out of the padding hidden under the outer plastic and the faint smell of a well-used diaper reached Rarity as being indicators that Twilight had gone in the thing at all. It really was something to make the fashion oriented pony feel pride for.

At the top of the stairs Twilight paused waiting for Rarity to catch up.

“In here darling.” Rarity said passing by Twilight and pushing open the door to her bedroom. The room itself was not particularly spacious as there was significantly less floor area for the second level than on the first. However Rarity had managed to squeeze in a four-poster canopy bed with purple drapes to match her mane color not to mention a sizable dresser. There was a small side table on the far side of the bed upon which sat a single lamp that provided all the illumination in the room. Between the soft lighting and the plush bed it really was a cozy little space. At least this was the impression she hoped her frequent ‘guests’ had of it.

“It actually has been a little while since I was up here hasn’t it Rarity." Noted Twilight.

“Indeed it has.” Rarity replied, “Though I don't think much has changed. It's a huge pain to move around this heavy furniture after all. Trying to lift that bed gives me a headache.”

“Why, Twilight, am I discussing furniture under these circumstances? You must think me crazy. Here on the bed you go.” As Twilight worked to get up on the bed Rarity pulled the finely made red and white comforter off and neatly folded it over on the dresser. This revealed that the bed mattress was covered in a thick clear plastic protector sheet that was pulled tightly over the sides and corners. It squeaked softly as Twilight moved around on it trying to make herself comfortable.

“Though that,” Rarity said pointing a hoof at the plastic sheet “I believe is a new addition from your perspective. Originally I bought it for Sweetie Belle so that I could put it on the bed when she spent the night here with me but I have since discovered that I find it very convenient for my own proposes. I would never forgive myself if I ever did anything to ruin that mattress!”

“So um, how do you want me to uh…position myself for whatever it is…” Twilight asked awkwardly.

“Twilight you really have no idea how adorable you are when you’re nervous like that do you.” Laughed Rarity climbing up onto the bed herself. “Just lay back, relax, and let me do the work.”

Twilight, her face feeling a bit hot from embarrassment lay back into the soft pillows with her back legs spread out in front of her revealing the fullness of the diaper between thoes legs. The diaper’s outer plastic covering was pulled tight by the urine filled padding underneath presenting a slick smooth surface which reflected the dim light from the room’s only lamp. The printed image of the Canterlot supermodel Flur stood out proudly on the front as if personally endorsing the diaper and its messy contents. Rarity watched Twilight shift around in her diaper a bit more, no doubt enjoying how her mess squished and oozed around her butt and between her legs with every little movement.

Well if we’re going to do this might as well start now. Thought Rarity

“So what-“ Started Twilight.

“Shhhh…” whispered Rarity. “Just enjoy yourself princess, no need for explanations.” As Twilight looked on intently Rarity bent down and kissed the front of her diaper and just for added measure licked it as well. It was worth it as this unexpected action got a giggle out of Twilight. Good thought Rarity that means the poor girl is relaxing, now hopefully we will be able to get somewhere. Rarity sat up straight again but now she pressed her hoof firmly into the front of the diaper. Not just a rub as before but a hard press. This elicited a sharp intake of breath from Twilight. Not quite a gasp but Rarity would take what she could get.

“Feels wonderful doesn’t it, Twilight” Asked Rarity somewhat rhetorically considering the obvious answer. As she continued her firm presses. The fact that each press left a temporary indentation in the plastic and padding spoke volumes about just how much mess there really was in Twilights Diaper.

At this point though it wasn’t just Twilight’s diaper that Rarity was paying attention to. Though she had never fully stopped being aware of her own soaked and completely filthy diaper now she was suddenly much more aware of it. How its tightness firmly pressed the poop into her fur so she could feel the damp slickness all over her sensitive skin. How every time she moved she could feel the thick goo squish its way up into every fold and crevice of her sensitive marehood. Her clitoris felt like it was on fire buried as it was in a thick coating of her own beautiful bodily waste.

Rarity tried her best to concentrate on her activities with Twilight, it really wouldn’t do for her to cum now. Though if she were any judge Twilight was closer to the edge than she herself was. The Alicorn was pressing her diapered crotch into Rarity’s hoof harder each time and was beginning to grunt or moan with every thrust of her hips. Twilight was close and Rarity knew just how to give her the satisfaction she disserved. At the same time that Rarity forced her hoof into the front of Twilight’s diaper as hard as she could she leaned forward and wrapped her tongue and lips around Twilight’s horn.

Her reaction was every bit as satisfying as Rarity was hoping for. With a sort of strangled cry Twilight bucked her hips hard into Rarity’s hoof several times while her horn glowed softly and created a tingling sensation in Rarity’s mouth. After a few more weaker pelvic thrusts and a shudder Twilight fell back onto the pillows breathing hard.

“Oh Rarity, that… was wonderful…thank you…” Twilight said between gulps of air. “I guess…I needed that.”

“Don’t think we are through just yet my dear.” Rarity said running a hoof up and down through Twilight’s soft belly fur. “The best is still to come!”

Chapter 3: A Relaxing Stay

To Twilight’s surprise the next thing Rarity did was she began to untape her diaper. Rarity didn't give her any warning at all but suddenly Twilight felt a tugging on her front and as she watched Rarity’s blue tinted magic was slowly and methodically pulling the four fastening tapes off the front of her diaper. Twilight did note though that Rarity was doing so in such a way as to not damage the tapes at all potentially allowing them to be reused.

With a final pop the last tape came free and the front of Twilight’s diaper came loose. With a twinkle in her eyes Rarity stretched out a hoof and pulled forward on the top of the diaper. The front fell outward with a heavy plop as it landed on the plastic mattress cover. The sight that greeted the two ponies made Rarity gasp with delight and Twilight smile nervously.

Both the inside of the diaper and all the available space between Twilight’s legs was coated in a light brown glistening layer of slimy poop so thick that Twilight couldn’t even see her own marehood under it all. There also seemed to be another thin layer of clear liquid over much of the mess between her legs which was undoubtedly her just released mare cum. This made the whole collection of greasy filth shimmer in the lamp light.

“Oh Twilight I do believe that’s one of the most beautiful things I’ve ever seen.” Said Rarity with what seemed to be tears in her eyes.

The moment Twilight’s diaper was opened two new sensations swiftly occurred to her. The first was the admittedly very bad, yet somehow exciting, smell and the other was that without the diaper providing insulation the wet goo covering her suddenly felt quite cool. To be honest it was rather a pleasant feeling on an otherwise quite warm evening.

As Twilight was still trying to process her feelings Rarity reached out her hoof again and this time pressed it into the slimy coating right where she guessed Twilight’s marehood would be and started to gently push the brown mess away from her lower lips. Twilight tensed up at the sharp spike of pleasure at having a hoof tip move over her still quite sensitive area but that was nothing compared to the overwhelming ecstasy that knocked her back into the pillows behind her head when Rarity, a pony renown for her hatred of getting dirty outdoors plowed muzzle first into Twilight’s slick poop coated clit and began licking as deep inside it as she could reach.

Twilight, despite all efforts couldn’t keep herself from squirming all over the place, she even went so far as to reach around behind Rarity’s head and with a foreleg she pressed Rarity’s muzzle into her messy clit as hard as she could giving no thought on how the poor mare was supposed to breath under such circumstances. Yet Rarity expressed no apparent discomfort at this treatment and went right on making Twilight alternately whimper and cry out depending on what Rarity’s tongue was doing at the time.

Eventually the combined stimulation of her mess coupled with Rarity’s restless tongue proved too much for Twilight’s system to handle and with a couple swift convulsions of her back legs and hips Twilight came with a rather undignified yell into Rarity’s waiting mouth. Looking up at her partner for the night through half lidded eyes Twilight watched Rarity lift her head up from between Twilight’s legs showing her otherwise bright white teeth and cute lips coated with Twilight’s mess along with the new addition of a clear glossy fluid covering just about everything else.

Rarity, licking her lips, sat back down onto the bed in her diaper making a soft squishing sound and stared at Twilight fondly.

“Looks like my little pony has finally worn herself out for the night. Don’t worry about helping me with my needs for now; I can take care of that on my own. I think I’ve let you be exposed for long enough, its time to go back in your comfy diaper for the night. We wouldn't want you making a mess in the bed after all.”

With that Rarity’s horn began to glow and Twilight’s slick scat coated diaper tightly taped itself back up around her waist with a slight squelch. Twilight for her part simply shifted back deeper into the pillows as her still leaking slit was re-immersed into her comfortably cool squishy mess.

“Give me a minute to freshen up dear, I enjoy a mess in a diaper as much as the next pony but I can only take it on my face for so long!”

Rarity turned and sauntered off toward the bathroom giving Twilight plenty of opportunity to enjoy the thick diaper still holding tightly to her rump and refusing to sag despite its much-increased weight, the once perfect white color now beginning to turn slightly brown.

With the click of the bathroom door closing behind Rarity, Twilight turned back to stare out at the room. Her wings were still extended far out to either side of her, an unavoidable side effect of what her sensitive places had just experienced and to a certain degree were still experiencing. Now though, having had her sexual needs attended to Twilight became aware of a different sort of pressure that had built up between her legs. She contemplated letting it all go then and there but the sound of the bathroom door swinging open told her to be patient, at least for a bit.

Rarity sure was a master of cleaning herself up thought Twilight, looking at the white pony’s face now she never would have guessed how Rarity had appeared just minutes ago.

“Well now that’s taken care of.” Rarity said breezily, flipping her mane to the side with a shake of her head. “There is the matter of my needs, yes I know I said you don't have to bother with that and you still don’t need to do anything really but I would still like to um, ‘use you’ for my purposes if its quite alright.”

Twilight thought this wording odd but nodded her ascent. “Sure, Rarity, what ever you want. But first…” Twilight said motioning towards her diaper, “I thought you might like to... well, its just that I really have to go again.”

Rarity’s smile grew wide and almost a little predatory. “Dearest Twilight, were you thinking of me? Were you holding yourself back while waiting? You’re into this more than you like to admit I think.”

All Twilight could do was blush but Rarity was correct, as usual. Rarity hopped up onto the bed with surprising finesse for a mare with a thick messy diaper filling up the space between her thighs and immediately leaned forward with her face only inches from the bulk of Twilights own diaper. Rarity put out the tip of a forehoof and softly rubbed it over the front of Twilight’s diaper.

“Wet yourself for me Twilight, please? It would make me so happy to see you enjoy it.”

“Of-of course Rarity” Twilight said needing no real extra encouragement, the pressure was becoming quite uncomfortable after all.

Twilight released her hold on her bladder with a sigh and immediately her warm pee gushed out into the slimy poop coated padding. The force of her flow was too great for the now limited absorbency of her diaper to handle immediately, which made her urine splash back onto her still sensitive clitoris and lips before running down over her anus and pooling beneath her tail. In the process though it mixed with her mess turning it into a thick squishy soup, which she happily splashed her butt around in all the while still peeing forcefully. Eventually though her stream came to a stop letting the diaper finally catch up in its duty and the pool under her tail base was absorbed slowly into the already soaked and messy padding.

Rarity for her part looked to be in a trance of some sort gazing as intently at Twilight’s diaper as she was.

“Um, Rarity, I’m finished.” Said Twilight trying to get her friend’s attention.

“We-Well that was worth the wait! To be honest I’m almost envious, I don’t think I’ve ever seen another mare wet quite as beautifully as you do.” Said Rarity finally looking up.

“Seen another mare?…How many have you seen-“ Twilight was cut off with a hoof pressed to her lips.

“Never mind that for now.” Rarity said. “Perhaps I’ll tell you a few stories another day but for now it’s just you, me, and two very well ‘loved’ diapers.”

“Now you can’t expect a healthy young filly like myself to be able to watch what I just have and be able to get a good night’s rest without first attending to her needs do you? Rarity asked rhetorically.

“No, I guess not.” Twilight said smiling.

“Indeed not. Now just lie there and get comfortable, this shouldn't take too long.”

With that Rarity placed her right legs over the other side of Twilight, straddling her chest. She then gently lowered herself down until her diaper made contact with the soft fur of Twilight’s stomach and the continued lowering herself until all her weight was on Twilight’s middle with her tail extending back out between Twilight’s legs. Rarity’s sigh turned into a moan as her diaper squished audibly. Twilight noted that the areas around the leak guards of the leg openings on Rarity’s diaper had turned a dark brown. Perhaps Rarity had pooped in her diaper again? That would certainty explain her powerful reaction when sitting on her chest, the Alicorn thought. Rarity leaned forward slowly all the while making sure her diaper kept even contact with Twilight’s stomach. Despite the diaper’s bulk Twilight was certain she could see a thick pile of poop being forced between Rarity’s legs and up the front of her diaper. For a moment Twilight was worried that it would end up spilling out over the top making a huge mess she would have to clean up before going to bed, However she needn’t have worried as Rarity stopped leaning forward when her lips pressed into Twilight’s own.

Rarity’s kissing forced Twilight’s own mouth to open and she could faintly taste her own mess from when Rarity had buried her face into Twilight’s scat covered pussy. Though she had to admit it was actually Rarity’s breath that smelled worse for understandable reasons. None of this really mattered to Twilight as she was simply in heaven now that Rarity had begun to slide her diaper up and down the length of Twilight’s belly.

“You know…Twilight…sometimes it just…seems so right…to do this sort of thing… in a diaper. Let yourself get…messy in the…the front I mean. After…all our marehood is so…so close to where our…waste comes…from, doesn’t it make…sense that a filly might… at least every now…and again…get herself…rather dirty…in the course of…making herself feel…good?” Rarity asked while becoming increasingly energetic in her motions.

Twilight could see a number of ways a mare might disagree with Rarity on that point thought Twilight ruefully, yet Twilight could, oddly, see Rarity’s view on the matter. And after all who was she to argue considering she had spent the whole evening doing much the same as Rarity had.

Twilight also couldn’t help but note that with the way Rarity was pressing her messy diaper into Twilight’s midsection with such force that it was probably for the best that Twilight hadn’t eaten anything for a while. Otherwise she was sure, this experience would have become somewhat more uncomfortable.

With a final cry and a tight squeeze from Rarity’s thighs about her middle the white unicorn collapsed onto Twilight breathing hard.

“Mmm…that was wonderful Twilight, thank you…”said Rarity sleepily. “I really needed that after all he activities today. Well, since it’s already so late I was hoping you wouldn’t mind spending the night?” Rarity asked hopefully while sliding off Twilight to lay next to her on the bed.

“To be honest I was considering the same thing.” said Twilight.

“Oh how wonderful!” Said Rarity as her horn lit up turning off the lamp by the bedside and plunging the room into darkness.

“I’ll see you in the morning then Twilight.” Rarity said laying a foreleg over Twilight and pulling herself in tighter to the alicorn’s side, the front of her messy diaper squishing against Twilight's hip.

“Huh? Wait, but our diapers and-“ Twilight began, suddenly realizing that Rarity intended to simply fall asleep right then and there.

“What about them silly filly?” Asked Rarity with a touch of amusement in her voice. “There are few things more enjoyable in a pony’s life than getting a good nights rest while being comforted by the soft warmth of a thick messy diaper. Just relax in it and you will be asleep in no time, its very refreshing.” Besides, it’s late and I don’t want to deal with cleaning this up until morning. Rarity concluded.

Despite her initial shock Twilight could understand Rarity’s feelings. The slimy mess coating nearly everything under her diaper did feel oddly comforting as if its very presence meant that she was somewhere secure, somewhere she could experience such things of her own free will and where she could find the time to relax enough to spend the time to enjoy it and clean up properly afterwards without being rushed.

Twilight decided then that all things being equal there really was no good reason not to simply go to sleep and deal with whatever needed dealing with in the morning. Besides there was the fact that she had a rather hot mare in an equally well used diaper curled up so contentedly by her side. After all, what kind of friend would Twilight be if she disturbed such a scene of serenity?

As Twilight began to drift off to sleep in the warm embrace of her dirty diaper she heard a faint sound like a soft hissing coming from the vicinity of Rarity’s diaper. Twilight smiled to herself as she snuggled deeper into the pillows. Rarity’s wetting was beginning to become one of her favorite sounds.

***************************************************************

Twilight awoke laying on her left side her form illuminated by the diffuse sunlight streaming through the curtains of the large east-facing window. At first her mind simply drifted with little awareness of her physical form at all, only dimly acknowledging the plastic protected mattress she rested on. Before long though the presence of something warm and…squishy surrounding her crotch and butt made her look down at herself. She was greeted with the sight of her full disposable diaper who’s outer plastic layer, once a light violet now appeared slightly brownish from the stained padding underneath. The image printed on the front of the diaper of the famous Canterlot model Flur looked out at her as happily as ever.

Twilight smiled to herself as the memories from the day before filtered in to her waking mind. Rarity was right, sleeping in a well used diaper was a great experience, even better when that experience could be shared.

“Good morning Rarity.” Twilight said stretching her legs out and rolling onto her back “Thank you for- oh….” There was no Rarity to thank apparently. Twilight suddenly found herself alone in the bed. Though now that Twilight was paying attention the sound of running water coming from the bathroom might well explain Rarity’s absence.

Lacking any better ideas for what to do while waiting for Rarity to come out Twilight simply decided to enjoy her diaper, it was why she was still here after all. Though having lost interest in staying in the bed by this point Twilight got up on her hooves and gently hopped off the red and white patterned mattress. The young Alicorn simply trotted around the room idly examining her surroundings while enjoying the way her still securely fastened diaper squished around her sensitive parts and rump. She had been wearing the thing constantly for over twelve hours by now she was sure, with it being wet and messy for most of that period. The diaper was beginning to smell quite bad which didn't really bother her, she was slightly concerned though that having her mess in direct contact with so much sensitive skin might not be for the best over long periods. She figured being an Alicorn may help with that, though Rarity for her part hadn’t seemed to worry about any discomfort.

As Twilight continued to wait for Rarity she soon felt the need to go, a common thing for her in the mornings. Might as well, Twilight thought, it won’t make things any worse and besides I’m going to be out of this diaper soon enough. Without pausing to give it any more consideration than that she simply spread her back legs and pushed. Twilight was immediately rewarded with a hot pile of squishy poop spilling out of her into the back of the diaper mixing with the mess from the day before. It really was wonderful just being able to go in a diaper like that. There were so many pleasant sensations a pony missed out on by simply using the toilet. There was one more thing Twilight could do to make it feel even better though. She hopped up onto the bed where she laid down on her back then slowly rose into a seated position with her back legs sticking out over the edge of the bed. This process squished the new mound of somewhat runny poop straight between her legs and up the front of the diaper. Twilight sighed basking in the new sticky warmth spreading around her marehood. At that moment it was difficult for Twilight to imagine anything at all which could feel better. This is what wearing a diaper is all about thought Twilight, pressing a hoof into the front of her completely full diaper it just-

“You wound me Twilight! Going off and having fun without me like that? How insensitive!” Rarity said now with a coat as fresh and sparkling as always standing in front of the now open bathroom door.

Twilight for her part quite nearly fell off the bed.

“Gha! S-sorry, I was just waiting for-“

“Oh Twilight, I was simply teasing you, here now, as good as it looks on you I believe you've been in that diaper long enough. You’re of course welcome to use my bathroom here to freshen up for the day.”

“Right yes, I should clean up as soon as possible, can’t go around town like this now can I, haha” Twilight laughed nervously.

The Alicorn princess rounded the bed and stepped into the surprisingly spacious bathroom given the overall size of the boutique’s smaller upper floor. She couldn’t help noticing the way Rarity’s eyes followed her movements in a way that made Twilight quite certain that if Rarity could come up with a good excuse to keep her in diapers she probably would have. Unfortunately for the unicorn Twilight couldn’t stay in that place forever. Spike would probably begin wondering where she had gone off to this time and there was her upcoming trip to Canterlot that required preparation.

“Hey Rarity?” Twilight called out from the bathroom. What would you like me to do with my diaper? She asked realizing that she had no idea what Rarity had done with hers and seeing no convenient place to dispose of her own.

“Don’t worry about it, just leave it on the floor to the side there and I’ll deal with it after you’re finished in the shower.” Rarity replied back from somewhere out in the bedroom.

Odd, thought Twilight, it wasn’t like Rarity to let another pony leave a mess out in a room. Then again little that Twilight had seen the pony do over the last day had fit in with her preconceptions of Rarity’s private life.

“Oh, ok.” Twilight replied back already working at the tapes with her magic.

Though still securely fastened they held little resistance against a concentrated magical force and they soon all poped free.

Twilight then levitated the diaper over to the side out of the way under the sink. She found herself being rather amazed while looking at the thing. The inside was completely coated in her filth and the whole diaper was swollen with her fluids.
The clear comprehension that she had not only been wearing such a wonderfully disgusting thing but had actually spent an entire night’s sleep in it made her rather hot. Though this was not a time to get involved with another self-pleasuring session. She was beginning to want to get home and the sooner she cleaned herself up the sooner she could be on her way.

She began in the most direct and effective way she knew how, with a glow surrounding her horn Twilight pushed her magic against her lower body and using it like an unnaturally effective squeegee she removed the vast majority of her mess out of her fur and into a slimy brown ball floating in the air. For a second she wasn’t sure what to do with it. The obvious choice would be the toilet but that seemed like a waste somehow. No, why not simply put it in her old diaper with the rest of it. It seemed fitting somehow as she squished the ball of poop in with that sill in the diaper. Twilight giggled a bit as she spread it around with her magic.

Though her magic had taken care of the vast majority of the problem it hadn’t done much about the rather overpowering smell or the fact that much of the fur around her hindquarters was now slightly stained. One way or another she was sure that Rarity had plenty of ways of dealing with this exact situation. A quick glance into the bathing area complete with shower told her that she had been more than correct about her assumption when she found well over a dozen varieties of shampoos, conditioners, and scented soaps. Despite her desire to get home soon Twilight decided that no matter what, she was going to take the time to enjoy this process, it was after all a bit overdue upon consideration.

**********************************************************************************

Stepping out of the bathroom, mane wrapped up in a towel and followed by a small cloud of steam Twilight once again found herself alone with no Rarity in sight. Probably went downstairs to get to work on something or other, Twilight thought.

After having the diaper on for so long it actually felt a bit strange to not feel it around her, and this feeling of absence reminded her that the diaper in question was still on the floor of the bathroom where she had left it. Even though it made the bathroom smell unpleasant Twilight had no obvious options other that to simply go along with what Rarity had said and leave it alone. Though for fear of the smell permeating the bedroom as well Twilight opened the large curtained window on the west side of the room before making her way down the stairs to the main floor.

Despite her wanting to get home Twilight made an effort to find Rarity to thank her for the strange but wonderful, and it should be said enlightening, overnight stay. However as it turned out Rarity was had further plans for Twilight.

“There you are Twilight, would you be a dear and take this by Sugar Cube Corner on your way.” It’s going to be a busy day for me but Pinkie Pie is really looking forward to this delivery.” Rarity said emerging from one of the back rooms with a saddlebag held in the air with her magic.

“A delivery…?” Twilight repeated, her mental train having been momentarily derailed by the unusual request. After all most of what Rarity sold were dresses, and Pinkie Pie had hardly ever worn thoes. Furthermore Rarity didn't make a habit of having her friends deliver things for her.

“Yes, dear, a delivery.” Rarity said smiling. “Please, for me?”

Twilight really couldn’t come up with a good reason to deny the request, besides it wasn’t as if it would take her much out of her way. So with a slight inward sigh and an outward smile, she answered in the affirmative.

“Oh thank you! You really are a good friend!” I hope so, Twilight thought to herself considering her official title.

Before opening the front door to let Twilight out Rarity stretched out her head and gave Twilight a soft kiss on her lips. “I mean what I said, Twilight, you are a good friend, as good a one as a mare could wish for.” Rarity said stroking circles around Twilight’s cutie mark. If you ever want to come by for some company I would love to have you over here” I do sometimes get lonely by myself you know, Applejack isn’t always around and…” Twilight’s heart softened for her old friend, she was perfectly aware of Rarity’s implications but chose not to directly reference them.

“Of course Rarity, I’d love to give you some company, it would be my pleasure.” Twilight couldn’t help but return the kiss along with her reply. As their lips parted Twilight swung the door open with her magic and stepped outside into the bright early afternoon sunshine.

“See you later Twilight! Oh and tell Pinkie Pie that I expect to be repaid in the future.” Rarity called as she closed the door.

The alicorn couldn't help but blush at the thoughts that came to her mind, unbidden, as to precisely how it was Rarity surely meant to get her 'repayment'. Perhaps if she was lucky enough she might be allowed to be invited for the fun, but that was a project for another day.

As Twilight wandered her way closer into the center of Ponyville the number of ponies steadily increased. Due to it being a Sunday many ponies were simply out enjoying their day off and incidentally the nice weather. There was Lyra and Bonbon laying next to each other in the grass reading what looked like a magazine of some sort and a group of fillies were playing in the small shallow stream that wound its way through the town. It all rather made Twilight feel bad for Rarity who insisted on cooping herself up in her place of business to continue her work instead of taking a break like most ponies. Well there was not much hope of changing that behavior any time soon considered Twilight. Rarity loved her work and there was no separating her from it.

Some of the ponies gave Twilight sideways glances as it was unusual to see the Princess of Friendship walking around town with a pair of saddlebags and ones with Rarity’s cutie marks printed on them no less. Twilight resolved to not show any embarrassment and continue on her way as though nothing was out of the ordinary in the least.

At last the Alicorn came upon Sugar Cube Corner, the most successful bakery in town and where her good friend Pinkie Pie was a live-in assistant. The large two story red and white building never failed to feel warm and inviting. Twilight hurried up her pace eager to get on with things and drop of the saddlebags and whatever it was they contained so as to not attract anymore attention. Or rather no more than was normal for an Alicorn of her social standing.

With a ringing door bell Twilight stepped into the well stocked establishment despite the “closed” sign on the door which given her familiarity with the shop’s owners and staff she could generally ignore at will. The front showroom was ringed with cases full of cakes and pastries which lined every wall and a large counter in front for serving the many customers which could be expected on any given weekday.

Before Twilight could make her presence known to the seemingly empty bakery beyond the sound of the doorbell a loud “Up heeeere!!” came from upstairs.

Well let’s see what this is all about then. Twilight thought to herself starting for the stairs.

Chapter 4: Inspirations

Upon entering the loft bedroom on the right of the stairs Twilight was greeted with an unexpectedly normal situation. Pinkie was simply laying upside down on her bed staring at the celling with her typical wide smile.

After a few odd seconds where the pink pony simply kept looking up at the ceiling without any acknowledgment of Twilight's existence Pinkie Pie suddenly turned herself over and hopped off the bed.

“So, you brought my delivery from Rarity?” Pinkie asked with simple curiosity as if her earlier non-sequitur had never transpired at all.

“I uh, well yes, I guess I did” Twilight said fumbling out her reply as she levitated the saddlebags off her back. It was a relief to have them off her not so much because of any weight they had which was quite little in fact but simply because she had grown accustomed to not having needed them so much in the years since her ascension and now they felt strange and slightly uncomfortable against her wings. Perhaps this was why Pegasi as a rule generally did not use the things. Though she had seen Rainbow Dash do so on occasion.

Twilight was distracted from her musings on Pegasi and their preferred methods of cargo transport by the rustling sounds of an excited earth pony digging into the contents of the saddlebags Twilight had brought. Out of the left-hoof bag came what looked like a collection of various items including but not limited to a pair of what looked to be travel brochures a couple small square samples of a very smooth and shiny material in pink, black, and grey and a small wrapped box, contents unknown.

Twilight decided it was better for her sanity to simply sit and watch the pony in front of her than to risk getting involved in another conversation. Having hoofed around at the contents of the first bag while excitedly mumbling to herself Pinkie moved onto the second and when she opened it and extracted something large and wrapped tightly in a plastic bag or two, Twilight couldn’t be sure, her smile became and grin and she hurried over to the front left corner of the room.

“Just what I always wanted!” exclaimed Pinkie as she carefully laid the wrapped item out on top of the table located there. A changing table Twilight now saw. It wasn’t a new addition, it had been there for quite some time ever since the Cakes had had their twins several years ago. How old would they be now? Twilight asked herself, four? No, five years? Surely no more than-

This time it was Twilight’s sense of smell which brought her back to the present. It was a now very familiar smell, one which she had recently had good practice in getting more acclimated to. The smell of a very well used diaper began to permeate the room and it was coming from the now unwrapped object that Pinkie Pie was removing from its wrappings.

Twilight sat up in surprise as she stared at the changing table and what lay on top of it. Rarity’s used diaper, as unmistakable to Twilight as her own wings lay untapped and exposed on the soft mat on top of the changing table, the insides of which were completely coated with Rarity’s thick brown waste from front to back. The diaper smelled even stronger now than it had before as its contents were mostly near on a day old by this point. Twilight wasn’t sure whether to be turned on or repulsed at this new development.

It became swiftly apparent to Twilight however that Pinkie Pie had no such reservations as the smiling pony dipped a hoof tip in the mess, swirled it around and then in one swift motion licked it all up and swallowed.

“Wow Twilight! This tastes just like Rarity, which makes sense, since it’s Rarity’s!” Pinkie giggled while licking her lips. “Would you like some?”

How could she possibly know what-

“Um, hehe, No Pinkie, I think I’m fine… Twilight said again not sure if excitement at seeing this was a good thing or not.

“Your loss Twilight! It tastes just like dwarf blue iris blossoms in March!”

Twilight’s left eye twitched.

While the Alicorn tried to restart her stalled mental engines the pink mare had hopped over to the far side of the changing table and was busy rooting around in the diaper pail located there. As Twilight looked on Pinkie fished out a disposable diaper which while smaller and less…well decorated than Rarity’s had been equally well used.

“Huh? Where did that come from?” Asked Twilight, her mind finally catching up with events. Who’s been using this place? That diaper is too small for y-“

“Oh this? This is Pumpkin Cake’s! I let her wear diapers when I babysit her on the weekends.” This was her Saturday diaper.” Pinkie said as though discussing bath towels. “I think she secretly likes them.” Pinkie whispered as though there was somepony to overhear.

“She must,” thought Twilight ruefully eyeing the smeared about contents of the plastic undergarment.

“Wait, ‘Saturday diaper?’ You mean she only wore one?” Asked Twilight with confusion.

“Well, she never wants me to change her, so I just gave up and let her stay in it until its time for her to go home,” shrugged pinkie. Besides, what kind of pony would I be if I didn't allow a filly to be as happy as possible?”

Twilight considered the irony that had such a statement been made in reference to nearly anything else it would have come across as responsible and kind. Under the current circumstance though…

Before Twilight could formulate an intelligent response to this the pink mare turned herself around and hiked her tail up giving Twilight a very full view of the pink furred earth pony’s thickly rimed plothole and wide full marehood.

“Besides Twily, with her leaving her used diapers behind I get to keep them and do things like this!”

With a forehoof Pinkie maneuvered the diaper around and under her tail and with a wet squelch she slapped the mess coated young filly’s diaper right up between her legs where she proceeded to rub its light brown slick contents all over her puckered anus and wet slit apparently putting special attention into working it into and between her pussy lips as much as possible.

Twilight stood there rather shocked, first Rarity and now Pinkie Pie? Who else might possibly be into… probably best not to make too many assumptions she decided, it was best for her state of mind to not go around seeing hidden diaper lovers in everypony she knew. Besides out of all her friends Pinkie Pie was the most likely to get involved in a habit as weird and filthy as this one. Rarity though…that was still a genuine surprise.

“Mmm…so poopy…” Moaned Pinkie Pie as she continued to grind her crotch into the sloppy day-old messy diaper.

It was one thing, Twilight thought, to stay for a while in your own messy diaper, but to play in somepony else’s… Then again, was what Rarity had done to Twilights messy slit with her tongue really any better?

With an unexpected sharp, short scream Pinky’s shuddering body came with force into the messy diaper being held against her marehood. Twilight for her part was rather caught off guard; the mare must have been considerably more horny than she had let on. Instead of making any sign of wanting to clean herself up as Twilight expected her to the pink mare instead bounced happily over to the changing table and jumped up onto it all the while keeping her tail lifted high in the air.

Twilight had to admit to herself that she was becoming a little excited seeing all the ‘fun’ Pinkie was having despite the awful smell. With absolutely no hesitation Pinkie proceeded to plop her backside down in the veritable sea of squishy brown mess, which was the interior of Rarity’s used diaper. Pinkie closed her eyes and rocked back and fourth obviously enjoying the sensations of another pony’s waste squishing against her sensitive places.

Opening her eyes Pinkie called over to Twilight. “Hey Twilight do you mind giving me a hoof here?” Pinkie asked motioning to the diaper tapes. “Unicorns always seem to do it better, what with the magic and all.” Pinkie said with a trace of annoyance on her face.

Having the pink pony say something to her directly finally got her moving again away from the spot she had occupied since arriving in the room.

“Um, ok,” Twilight said slightly uncertainty. “You just want me to pull it up for you and tape it? She asked.

“Yeppers! Isn’t this fun Twily, Rarity says she has given you a few ideas of her own. Maybe you can try some of them out soon!”

I think I got more than just some ‘ideas’ from Rarity Twilight thought with some amusement, though she said nothing. Twilight had just taken hold of the tapes with her magic when Pinkie thrust out a hoof at her.

“Wait! Stop, Silly me, I nearly forgot! In the righthoof drawer open it, please!

Twilight proceeded to do so. Inside among some random items like tissue paper and some filly’s mane clips there was what appeared to be an icing bag. Sure, Twilight was still technically in a bakery but certainty not the part where such things ought to be stored.

“Is um, this what you wanted?” Twilight asked with a quizzical expression while levitating the confectioner’s tool into the air in front of pinkie.

“Yes, yes, definitely!” Pinkie Pie grabbed it out of Twilight’s magic field and in a rather awkward move for a pony to achieve managed to stand partially upright and use her fore hooves to hold open the top of the bag and position it under her tail. With little globs of brown mess falling to the open diaper below in little splats, Twilight looked on at Pinkie with genuine curiosity.

With an oddly happy sounding grunt pinkie pushed hard and out of her anus poured a thick mass of slightly runny brown muck, which seemed to go on for a surprising amount of time, overfilling the icing bag and spilling into the already overfull diaper below. With a sigh Pinkie squeezed the top of the bag closed forcing some more of the sloppy mess over her hooves as she plopped herself back down into the diaper with a soft splat.

“Ahh, much better…now for the best part!”

“Um, Pinkie, what are you-“

“Shhh! Just watch a master at work Twilight!” I might give you an idea or two myself! Hehe!

Again Pinkie Pie managed to surprise an alicorn who thought that she had experienced and enjoyed being as dirty as a pony could reasonably get. Though with hindsight Twilight really shouldn't have been so surprised since ‘reasonable’ was rarely a term used in the same sentence as the name Pinkie Pie.

As Twilight watched, cowed into silence for the moment, Pinkie Pie lined up the long plastic nozzle of the bag with her vaginal opening, for the moment hidden underneath a slick coating of mare poop, and with confidence born of practice deftly inserted it in as far up into herself as it would go. Pinkie closed her eyes and shuddered, though not as much as she did when upon having sealed the icing bag she gave it a forceful squeeze as one would when quickly decorating a cake and pressed all the squishy poop it contained out of the bag, down the long tube and deep into her vagina, practically in her womb.

And here Twilight had thought Rarity to be a depraved mare, even more so than Twilight herself. Yet before her sat a pony who had essentially devised a makeshift dildo which would cum great quantities of her own poop deep inside herself. Twilight’s intellectual appreciation of Pinkie’s own inventiveness nearly overcame her concern for her friend’s wellbeing, though not quite.

As Pinkie rocked back and forth in the squishy waste of another mare having removed the now empty icing bag from her insides Twilight decided to voice her concerns. After all it was one thing to smear her poop around where it could be washed off but she wasn’t sure how a pony could easily go about cleaning herself up ‘in there’ especially an earth pony whit no real capability of controlling active magicks.

“Hey, Pinkie, are you sure that was ah, a good idea?” Asked Twilight staring at the mass of brown slime that was Pinkie’s crotch. I mean, pee is sterile and all but solid waste tends to have lots of-“

“Aw Twilight! I didn’t know you cared!”

“Of course I care, I’ve always-“

“Hehe, don’t you worry! I’m an earth pony remember, strong i-“

“Immune system, right I know but still… Twilight continued.

“If it makes you feel better Twilight, I’ve done this many times and it’s never caused me any trouble. Well except that some always tends to keep on leaking out for several days afterward… Really annoying because when that happens it makes me horny… and then I have to masturbate… and then I have to clean myself up again…which is a lot to accomplish between helping different customers...”

Twilight’s left eye twitched.

“Haha, you should see the look on your face. You are so adorable Twily! I’m actually very good at cleaning myself up! Any baker worth their batter has to be! Now, will you pleeeeze help me with this diaper?”

Twilight sighed to herself seeing that there was nothing really to be changed about the situation, Pinkie Pie had her vagina full of her own scat and was determined to enjoy it. Putting on another mare’s messy diaper around it wouldn’t make things any worse at this point. So with care she pulled the thick sloppy diaper up around the pink pony and resealed the tapes, which were still quite sticky and held the diaper tight against Pinkie.

As soon as twilight released her magical hold on the diaper Pinkie rolled onto her back and let out a relaxed sigh.

“Mmm, I’m peeing Twilight, wanna feel?”

“I, uh, sure,” Twilight said failing to come up with a good excuse for not doing so. Laying a hoof on the front of Rarity- Pinkie Pie’s diaper Twilight could feel and hear the soft hissing of fresh urine entering a diaper. Despite her reservations Twilight couldn’t help but feel happy for Pinkie who was laying back with her eyes closed enjoying all the sensations which came with wearing another pony’s- a beautiful pony’s poop filled diaper. Twilight was beginning to understand to some degree while watching Pinkie the intense stimulation she would be feeling knowing she was essentially bathing her nethers in another pony’s poop. And besides no matter that it was completely discolored now and beginning to leak the diaper really did look good on Pinky Pie.

The end of her stream of urine and the sound of pee dripping onto the floor brought Pinkie out of her state of utter relaxation.

“Oop!” Pinkie said looking over the edge of the changing table at the brown splatter of dripping urine mixed with poop. “Time for the other drawer!”

‘The other drawer?’ thought Twilight, great what now? However this time the action of getting into said drawer was not left up to Twilight who found herself being shoved out of the way by a pink mare who was quite suddenly not on the changing table.

As Twilight watched on Pinkie pulled out a garment made out of a black shiny material. As it was unfolded Twilight quickly determined it was a body suit of some kind, though obviously not the kind that one did any real work in.

“Latex, Twilight! It’s such fun to wear! Said Pinkie as she struggled into the thing, which seemed to be a bit difficult due to its tightness and elasticity.

“Latex?” That sounds familiar… but where-“

“Ask your foal sitter Twilight! She knows a lot about… A lot!” She’ll help you out!

“My foal sitter?” You mean Princess Cadance? What does she know about l-“

“Just ask her silly!” Pinkie interjected having now won out over the garment- a body suit that left only her head and hooves uncovered. Well and her tail remained free as well.

Twilight had to admit it was a rather…flattering thing for a pony to wear and there was no good way to hide a diaper underneath it. The bulge was rather obvious, though the shiny black latex did an admirable job of making it effectively impossible to determine what state the diaper was in.

“Well, thanks for all your help today Twilight! Its Pinkie’s nap time now and without that I may become cranky!” Good afternoon!

With that the sleepy pony plopped herself down on her bed and after a few wiggles brought on by the feeling of Rarity’s poop squishing itself up and out of the top of the diaper and into the latex body suit not to mention the wonderfully full feeling her vaginal passage gave her being as full of her squishy muck as it was she stretched out on her stomach and fell asleep before Twilight’s astonished eyes.

“But what about…” Twilight found herself saying out loud

Instead of finishing her sentence the Alicorn decided that as strangely as it had come on this was her chance to escape all this craziness and get home before something else happened to upset her already precarious mental equilibrium.

Twilight couldn’t help her smile as she softly shut the door on Pinkie Pie’s bedroom and the sleeping very, very messy pony within. Her smile only grew as she headed out of Sugar Cube Corner. Perhaps Pinkie was right, Cadance was the Alicorn of Love after all and even though Twilight had been intimate with the beautiful young princess on many occasions their activities had always been of a very standard nature rather lacking in things that may be described as ‘kinky’. Though, Twilight recalled with fondness, Cadance did seem to have a thing for tight thongs and horn play and liked to stick hers in very inappropriate places. And besides Twilight was sure that Cadance was an expert on just about every possible fetish a pony could think of weather or not Cadance actually enjoyed any of them herself.

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“See you later Twilight! Oh and tell Pinkie Pie that I expect to be repaid in the future.” Rarity called out to Twilight, smiling to herself as she closed the door.

Turning around from the front entrance Rarity hurried back up the stairs to her chamber intent on making sure that everything was in proper order before her client arrived late that night. It simply wouldn’t do to have a messy bedroom when a paying customer arrived seeking her services. After all she still had an image to keep up. Well, for most ponies at any rate.

Rarity went around with her horn alight straitening, tucking, folding, and brushing all the things she could think of. She also closed the window Twilight had apparently opened up to air out the room. Rarity decided she would find a way to thank the Princess for that at some point.

It was when she opened the door to her bathroom that a decidedly strong smell assaulted her. Of course she thought, Twilight’s diaper. 'I told her to leave it here didn't I'. Well, she thought looking around the rest of the bathroom, aside from the extremely well used diaper lying open on the floor. Twilight had done a remarkably good job of cleaning up after herself. Rarity was simply glad that Twilight hadn't taken the time to question the unicorn on why Rarity had let her simply leave her diaper in the bathroom which would of course cause her more 'work'. Rarity was not quite prepared to explain to Twilight just how much she enjoyed wearing other ponies used diapers. Twilight of course, would by now have some idea that Rarity was willing to interact with her diapers but she would not have any idea just how many other diapers Rarity had worn, including the used diapers of a number of fillies around Ponyville and Canterlot.

Grabbing the soiled diaper in her magic Rarity turned and headed out of her suite and down the stairs. Now that she was content with the level of cleanliness of her rooms she really only had one goal in mind for the rest of the day and that was to get a good start on the design and production of Twilight’s custom diapers. She really did feel a bit humbled at the fact that she had the chance to design diapers for another princess, a fact that Twilight needn’t know anything about just yet. The Princess of Friendship really had looked amazing in her diapers and perhaps provided the opportunity for Rarity to do her best work ye-

Rarity slowed from her previously rapid pace towards the back entrance to the boutique and came to a complete stop. She brought Twilight’s mess coated diaper around in front of her and gazed at it in increasingly excited thought. This diaper was smeared from the top of the front to all around the tail hole in back with a thick layer of alicorn poop and its padding was dripping full of her beautiful urine. This was exactly the situation she would be designing Twilight’s diapers to be able to deal with and not only that but here she had the best example of exactly what it was Twilight could do in her diapers. Perhaps she could even do more if giver more time.

Rarity was a pony that thrived on inspiration. It was how she made her quite successful living as a fashion designer after all. And here held in her magic was some of the best inspiration she ever could have hoped for, delivered really quite by accident. Biting her lower lip in anticipation Rarity spun on her hoof and headed straight into her design studio. As soon as she passed through the entrance she closed and locked the door behind her with alacrity. This was not a day for Sweetie Belle to be allowed to come barging in. Rarity had worn diapers around her little sister in private and even wet them a time or two in her presence, ostensibly for the sake of keeping the younger filly from feeling ashamed about what she did in her own diapers at night even though Rarity was beginning to be certain that Sweetie Belle wasn’t really as ashamed as she pretended to be. But what Rarity was planning would simply be a much too difficult thing for her to try and explain to her sister at this point.

With her heart beating more powerfully in her chest Rarity laid Twilight’s diaper out on the floor and stood over it with a wicked smile creeping up her lips. She lowered herself until her now dripping wet marehood stood just an inch above Twilight’s thick brown mess. Was she really going to go through with this plan? Yes, Yes she was, no more hesitation could be allowed. And with a nod of her head in personal confirmation of her dedication to her desires and work. She squished her crotch down into the thick, rather cool now, gooey mess as hard as she could. It immediately coated itself all over her marehood and anus and everything nearby getting smooshed into her newly cleaned white coat.

A low groan escaped her lips as she slid her hot pussy back and forth in the thick brown slime while taping the diaper tightly up around her waist with its top just coming up over her belly button. This was disgusting, this was repulsive, yet this was heaven. She knew that a few other ponies did this sort of thing. Pinkie Pie immediately came to mind. But she had never before gone so far as to actually wear another mare’s icky diaper about herself. Why hadn’t she? A part of her asked. Twilight was hardly the first mare to leave a messy diaper behind at the boutique. Sweetie Belle herself had done so on multiple occasions. Yet she had never really had a desire to do so. Perhaps with Twilight’s diaper she had been able to overcome some internal barrier? Whatever the case she was happy she had tried it here and now and in a way maybe that was for the best. After all she could hardly imagine a better way to begin wearing other mare’s messy diapers than by wearing one used by an Alicorn Princess of all the pony subspecies.

With a contented sigh Rarity stood up feeling Twilight’s mess slide around wonderfully between her legs as she trotted over to her workbench. Upon reaching her stool she smiled, plopped herself down with another groan of pleasure, and pulled out her preliminary notes and designs for Twilight’s diapers. She grabbed her favorite drawing pencil in her magic and spreading her legs she began to pee and sketch.