With Scootaloo wearing and using her diapers more over the past few days, Rarity realizes that Scootaloo is going to need some new clothes; clothes that are big enough to cover her bulging diapered butt.

So, after having breakfast, Rarity says, “Well, Scootaloo, we’re going out now to get you some new clothes. After that, we need some more diapers since you are now wearing them all the time. How does that sound?”

“That’s cool Rarity. I’d like that, most of my shorts and jeans are too tight over my diapers.”

“I see. Scootaloo, are you are still okay with wearing and using a diaper as your toilet?”

“Yes Rarity, I like being in diapers; there’re cool and they make me feel good, too.”

“Okay, diapers for you, so let’s get you some new clothes.” Says Rarity.

Rarity grabs her purse, Scootaloo’s diaper bag, and they go out through the front door and head on down the cobble paved road into Ponyville.

When they arrive, they find a small filly’s clothing store that Rarity usually never goes to as she likes to make Sweetie Belle’s clothes herself if she can. There, Rarity finds potential shorts and skirts for Scootaloo. She leads her to a changing room, and proceeds to have Scootaloo try them on to see which ones are the proper size. Scootaloo steps in and out of the new clothing with her diaper on while Rarity checks for the proper fit. They have decided on several new pairs of jeans shorts and two skirts. Rarity wants to go and see what other ones are available, now that she knows the size.

“Come with me, let’s go and see what other options are here for you, okay?”

“Sure Rarity, I like these ones a lot.” replies Scootaloo who is still wearing the last shorts she tried on. She looks down and rubs her crotch through the shorts and diaper.

They both leave the changing stall to go check out some more clothes. Going over the racks, Scootaloo and Rarity chat about various colors and prints of the items they come across. They agree on two more pairs to try on and begin to return to the changing stall.

“Hi there Scootaloo!” Comes a call from nearby.

The two look around to see the source of the voice and see Twist, a friend of Scootaloo from school, and Rarity sees her mom, Cookie.

“Hey there Twist!” Scootaloo replies first, followed by Rarity, “Nice to see you Cookie, and Twist. Seems you’re in need on new clothes as well?”

“Yes we are.” replies Cookie. “Twist here is growing so fast out of the few clothes she owns.”

“Same for Scootaloo.” says Rarity as she looks over and smiles at Scootaloo.

Scootaloo returns her smile with her own and a bit of a blush. The two older ponies chat a bit about what Sweetie Belle is up to and how Scootaloo is doing while Scootaloo and Twist exchange their own news of their lives. After a bit, Rarity tells Cookie good-bye and leads Scootaloo back to their stall.

“That was nice getting to see and chat with Cookie and Twist, don’t you agree?”

“It was nice Rarity. We had a good chat.” replies Scootaloo.

“Well that’s good, I want you comfortable and confident when you’re out and running into your friends. You see, your diapers have no effect on how you behave or how others respond to you. I’m glad that you’re okay with wearing them all the time, and your new shorts cover them well so it’s not so obvious you are wearing a diaper either.”

“I’m fine with wearing them on errands, I thought about them for a second when we were talking with Twist and Cookie, but quickly forgot about them.”

“That’s good to hear. I’m happy that you are so comfortable with them. What will you tell Twist or Sweetie Belle if they find out that you wear diapers?” Rarity asks as she opens the stall door and brings Scootaloo in.

Scootaloo stands there with a questioning look on her face that slowly turns to confidence, as if Scootaloo had just gone through in her mind the series of events and her response.

“Oh, I’d tell her that I have wet myself a few times lately and that you feel I should wear diapers until the wettings stop. I’d say that it’s okay with me because I’d rather wear a diaper than wet pants at school. After all, accidents happen and diapers are just a different
kind of underwear, that’s all.” replies Scootaloo.

“Well good for you Scoots. I’m glad you thought about this and I don’t mind taking the credit for putting you back into diapers, even though we both know you like wearing them and like wetting your pants too. Now, let’s see how these other clothes fit you.”

Scootaloo tries on the other new shorts and tells Rarity which ones she likes best. After this activity Scootaloo is left in just her diaper.

Scootaloo looks down at her diaper as she sits on the bench in the changing room.

“Hey Rarity, look here.” As she speaks, Rarity looks down at Scootaloo and then to her diaper where she sees the thick disposable diaper begin to change colors from white to light yellow. She watches as Scootaloo stares down at her diaper and brings her hoof up to Scootaloo’s crotch and holds her there, feeling the warmth of her pee and the force of it as she wets her diaper.

“You go filly!” she says.

“I can tell that you really enjoy being in a diaper. You just love using them.”

“Oh yes, they are just the best.” replies Scootaloo as the two make eye contact. “I’m wetting myself and I like it, Rarity.”

“Yes, I know you do, and it is okay with me that you do. Just let go and get all your pee out into your diaper. I think you should wear a pair of new shorts from here on, now that your diaper is a bit larger with all the pee in it.”

As Scootaloo’s urine flow finally tapers off, Rarity removes her hoof from Scootaloo’s crotch, but not before continuing to rub it several more times.

“You did well to wet yourself right here in the stall and not be embarrassed. Which pair of shorts would you like to wear?”

Scootaloo smiles at Rarity and sighs with relief from her wetting and chooses a pair of jeans shorts. Rarity smiles at her and helps her get the shorts on.

Their shopping done and everything in bags, Rarity asks; “Well, are you hungry? Because I am. We spent a long time shopping for you today. What do you say?”

“Oh yeah Rarity, that sounds good to me too.”

“By the way, how is your diaper? Are you in need of a change before lunch?”

“I don’t think so, I only wet it some more.” says Scootaloo as Rarity feels her diapered butt and crotch to see for herself the extent of its wetness.

“You’re right, I don’t think you need a change yet, we can deal with that after lunch.”

“Thanks Rarity, I like wearing a wet diaper.” Says Scootaloo, smiling while rubbing her diaper through her shorts.

“I like you in wet diapers too, Scootaloo. I know that you like wetting your diaper, and that first pee you did in the stall was a big one. I figured you’d wet yourself again before lunch as well, but that the diaper could hold it.”

Scootaloo blushes, “Yeah Rarity, it feels good and I get excited knowing that I am wetting my diapers. I like them and I like you feeling them too.”

“Well, I like that you like wearing and using diapers too and I enjoy feeling them as you do so.” Rarity says trying not to laugh.

“Even if I do a big stinky poop in them too?” asks Scootaloo.

“Yes Scootaloo, even when you do a big smelly poop in them too. I love you and want you happy, you just keep wetting and messing your diaper and I‘ll keep changing them whenever they get too full to keep the mess inside, deal?”

“Deal, Rarity.” replies Scootaloo as a big smile appears on her face. Rarity smiles back at her and then pulls up Scootaloo’s plastic panties and shorts. After checking on Scootaloo’s wet diaper again they leave the clothing shop and head for a nearby restaurant for some lunch, side by side.

After their mid-day meal, they head to Rarity’s own store, the Carousel Boutique, which while generally specializing in adult mare’s clothing, also stocks an assortment of diapers for all ages except for infants. Incidentally, the same place Rarity got Scootaloo’s first set of diapers two weeks ago.

“Hey Rarity, these diapers are cool looking.” Scootaloo says, holding a package of 24 thick disposable diapers with a light pink plastic surface.

“Well, let’s see if they’ll fit you then.”

She sees that the package Scootaloo chose is the proper size for her.

“You’re in luck, these diapers will fit you just fine. We’ll need another package or two since you use them so much.” She says as she looks to Scootaloo. Scootaloo returns the smile, but then Scootaloo’s expression changes to one of concern. Her body is saying that it’s time to poop right now. She grunts a bit and then looks to Rarity, who knows immediately that Scootaloo needs to use the bathroom from her experience with Sweetie Belle.

“It’s okay, you just do what your body wants, don’t worry about anything, you just let go and use your diaper. You know that you want too and I am okay with that. Just do it Scootaloo, pee and poop your diaper right now.” Rarity says with encouragement in her voice and her
hoof on Scootaloo’s shoulder.

Scootaloo looks up at Rarity and then begins to open her bowels. She keeps looking at Rarity as her poop begins filling the back of her diaper and she pushes and pushes her poop. Her body responds and begins filling the diaper, and the smell is noticed by them both.

“That’s great Scootaloo, don’t worry, just do it in your diaper. Get all that poop out now, you can do this, I know you can.”

Scootaloo continues pushing her poop, she’s not holding back anything. As her diaper fills up, her bladder opens and she beings to wet her diaper too. Scootaloo’s expression changes to one of satisfaction and contentment. She’s doing it, she’s pooping and peeing her diaper with Rarity, in public, in her own store. “That’s my good diaper filly.” Rarity says as she notices Scootaloo’s expression. She’s happy for her that she’s using her diapers just the way she wants.

As Scootaloo finishes emptying her bladder, Rarity places her hoof on Scootaloo’s butt and feels the massive bulge there. She them does the same for her crotch area and feels the warmth of her urine and her erection inside the diaper.

“You did a good job, you filled your diaper and it didn’t leak, you can’t even tell that you’re wearing a wet and messy diaper with your new shorts. Though, if Rarity is honest with herself this is a bit of a white lie.

"How do you feel?”

“Oh, wow Rarity, it was so good to just let go and use my diaper for everything. I didn’t have to run to the bathroom or hold it, I just did it in my diaper. It feels good Rarity; it feels really good.” Scootaloo says with relief.

“That’s great to hear, it’s so nice that you like using your diaper anywhere you are. I’m glad that you like them and like pooping and peeing in them too; after all, you are my diaper filly.”

They finish selecting some more diapers and Rarity also gets some powder and wipes for the occasional diaper change.

This time, instead of walking back home, Rarity hails a taxi carriage for them and their bags of clothing and diapers.

As they get into the cab, Scootaloo enjoys the feeling of sitting down on the hard wood slats of the carriage’s bench, making her poop squish up the front of her diapers, especially when she leans forward to adjust the bags at her feet. The warm, slimy poop just feels so good as it works its way up and over her pussy and penis inside of her thick diapers.

“Well I must say that you did a good job stinking up the store.” Rarity comments.

“And that’s ok, diaper fillies do that sort of thing; they can’t help it; they just need to use their diaper.” She laughs a bit as she looks at Scootaloo.

“Thanks Rarity, it felt so good to let go in there and poop myself. I really liked doing it. As for the smell, oh well, it doesn’t smell that bad.” says Scootaloo followed by her own little laugh.

Once home, they both unload the purchases. Scootaloo helps Rarity bring the stuff to Rarity’s bedroom where they put things away. Neither of them minds the smell from Scootaloo’s diaper or the fact that she’s still in it. She’s in no hurry for a change, and Rarity can sense this. She checks Scootaloo out as she walks and smiles to herself that her new shorts do a very good job of concealing her diaper and all that she’s done in it.

She leaves Scootaloo in her room so she can put her own things away. Scootaloo is content with herself and her wet and messy diapers and begins playing with the toys in her bedroom.

An hour or so later Rarity calls up from the kitchen, “Scootaloo, Cookie just dropped by and said Twist wants to know if you want to come over and play in a while. Scootaloo comes down the stairs with a smile on her face.

“Yes please, she’s a neat filly and I always like playing with her! But um, before I go though, would you please change my diaper?”