Six months earlier...

Rarity was hard at work on her most recent set of dresses for her clients in Canterlot. Ever since her accidental simple design for her friend Twilight Sparkle took off she was working tirelessly. Everypony wanted one and she was already running out of cloth and she had trouble keeping up with the demand. She heard a knock at the door to the Carousel Boutique and she sighed hoping that this interruption wouldn't take too long, she was so busy. She floated another dress to one of her larger mannequins to check that it fit her client's measurements and then left it on it. She carefully let her magic put the needle and thread down and then quickly gave her purple mane and white coat a brush so she would look presentable to her visitor.

She opened the door and it was the worst stallion she could possibly have visit right now. It was a Filthy Rich. He had a light brown coat and a greased and slicked back mane. He proudly wore an expensive red tie with a large dollar symbol on it.

"It's time to pay up Rarity, you are really behind". He said to her with his chin raised.

"Oh, I'm sorry darling, I didn't even realise, I've been so busy but..." The white mare started trying to explain frantically. But Filthy interrupted her.

"I don't care, I want your rent in a week or I am bucking you out of here" He said harshly.

"One week?!" Rarity gasped. "You can't be serious, my latest shipment of dresses isn't going out for two weeks, once it does I'll have a lot of money I promise".

"One week" Filthy simply echoed. He put a piece of paper on the ground and then turned to leave

Rarity quickly picked up the paper and looked over the figures she owed. It was a lot. So much that not even her newest set of dresses would be able to cover it even if she had two weeks. She frantically ran to her safe and opened it to see what she had left. She only had a fraction of the money she needed.

"How did this happen?" She asked herself. "How did I get this far into debt"? She thought back over the last few months and she realised what happened, she had been way too generous with her discounts and free dresses that she often offered her clients . She just loved her job, it wasn't about the money for her. But it hadn't occurred to her that she wasn't paying her bills.

The white mare stared at her needle and thread, she knew she should get right back to work, but it was pointless. Her only hope was to appeal to whatever good she could find in Filthy's heartless chest. She ran out quickly to catch up with the stallion.

"Please Filthy darling, I need more time than that" Rarity begged. "I'll do anything".

"Anything...?" Filthy's filthy smile spread across his face.

Rarity had a feeling she was going to regret saying that.

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It had been a few days since she started her new job. She now worked in a cubicle, but it wasn't an ordinary one. It allowed her to speak to her customers through a solid wall, but they luckily couldn't see her. Filthy had even provided her with a device to disguise her voice in the form of a collar, it felt appropriate as she now felt like a slave to her landlord that had forced her into the worst kind of work. She was grateful that he at least had the courtesy to let her do it in secret. If her Canterlot clients heard about this she would be out of the job that she loves and she didn't even want to imagine what her friends would think.

Customer after customer came in to talk to her. Some just wanted to purchase sex toys and others wanted to put their details in as looking for kinky encounters with other mares or stallions. It was her job to match them up with another client as quickly as possible and she was surprised that many of these ponies she knew very well. Lyra and Bon Bon were frequent customers, she had always suspected those two were more then friends. There was a prison like slit in the wall that she talked to her customers through. It allowed her to pass the sex toys through the wall and accept the money. It was a easier job than dressmaking, but it made her feel dirty and ashamed.

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It had been a week and she had already earned enough money to cover her rent and then some. She felt relieved that she wouldn't be forced out of the Carousel, but at the same time Filthy had made her sign a two year contract. So she was now stuck here. She really wished she hadn't said she would do anything.

Exhausted and sad Rarity returned home and laid on her bed, she sighed at the warm feeling of her bed and how she wanted to sleep. But she still had work to do. She got up and picked up her needle and thread and she began to work more on her dresses for Canterlot. It felt relieving to be back doing the job she loved, but after a full day working in the sex shop, she barely had the energy to even focus and several nights in a row now she had fallen asleep on the floor in exhaustion.

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Another week later the grind had started to really get to her. She needed another week to finish the Canterlot order and Fancy Pants had visited, he was the stallion that publicly praised her work and got her so many willing customers. She told him that she was just unwell and that she couldn't fill the order as quickly as he wanted. He was nice about it and just told her to take her time and that he would take what she had made so far to Canterlot and personally apologise to her waiting customers.

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It had been a month now and since she had finished making all the dresses she promised she was finally able to start getting a decent night sleep. But now she had to scale back her dress making business significantly. She barely did it as a job anymore and just became a hobby. She offered to make the dresses for free most of the time, because she now made so much money, her dress sales didn't even add anything significant to her wealth.

Rarity had to sneak into work in order to not let any ponies she knew find out that she was even working for Filthy, let alone what her work was. She was asked by her friend Pinkie Pie once when she suddenly appeared in front of her while she wasn't looking ahead and she had to come up with a bad lie, which she then had to turn into a truth. So she then had to spend the next week decorating every room in Filthy Rich's mansion, with fancy fabric fit for a princess.

Rarity was able to spend the weekends with her friends so they didn't suspect what she was doing very much. However they said that every time they visited her, she just so happened to be out for lunch all the time. She had no idea how she was going to keep up this lie for two years.

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Two months had passed by now and she was getting used to her life. She became a bit more accepting and enthusiastic about going to work and she become better at hiding what she was doing. She had decided to declare herself as taking a holiday to her Carousel customers and even offered a 95% off taking a break sale for a few days. Which Pinkie turned into a party and everypony supported her with greatly, saying that she was the most generous and best dressmaker in Equestria and more then deserved some time off as Ponyville's dressmaker.

She went to work in high spirits the next day and sat in her cubicle waiting for her first customer. She just sat around for a few hours as it was very quiet. She figured that ponies tended to be satisfied after a big party. Then she heard the bell ring that let her know a pony had entered the room. She got into position, got a form in case it was a pony looking for a match and gave friendly hello. But her collar made her voice should very masculine and scary.

"Um.... hello?" A sickly sweet voice hit Rarity's ears. She couldn't believe it, it was her best friend Fluttershy, what would an innocent little filly like her be doing here.

"Um.... hi, I...I have heard that this is where I can uh...." The yellow pony scuffed her hoof nervously at the fancy carpet in the room, she considered just running out as her courage was already leaving her at the sound of the scary voice, It made her feel really wrong that she was there. Rarity too felt very nervous that a friend she knew so well was about to become a customer, she expected she might see one of her friends in this line of work eventually, But for it to be Fluttershy first of all ponies, it didn't seem to fit her.

"It's okay dear, there is nothing to be nervous about, it's my job to keep anything you say here in the strictest confidentiality, just tell me what you want, a dildo, vibrator, birth control..." Rarity started but was interrupted by Fluttershy's response.

"I want... I want to be forcefully raped and kept a helpless prisoner".

Rarity stared dumbfounded at the wall she was talking through.

"What?" She asked her friend.

"Oh... i'm sorry.... I guess you don't do that.... I'm sorry.... I'll just be going then". Fluttershy turned to leave feeling embarrassed and scared.

"Wait" Rarity called out. "It's okay, I could organise something". She started pulling at her collar feeling as nervous as her friend. She started to think selfishly as she considered the situation. She thought her friend Fluttershy was adorable, maybe too adorable, images flashed through her head as she imagined having sex with the pretty mare and she had always had more of an attraction to mares. She bit her lip as she asked the important question that would either make or break her fantasy.

"Are you after a stallion or a mare?" Rarity asked.

"A stallion" Fluttershy replied.

'damn' Rarity thought to herself. "Okay I will see what I can organise, I think you need to give me some more details, how long do you want to be kept a prisoner for?" She asked getting right back into treating Fluttershy as a serious customer and her professionalism returned.

"I.... I.... I want to be rescued by my friends, but I don't want them to know I'm a willing prisoner". She replied.

Rarity shook her head in surprise, not just was she surprised that her best friend was here, but that she was also the customer with the strangest and most out there request she had ever heard.

"That will be very difficult to make happen" Rarity warned her and then started wondering how it would even be possible. "It will be expensive" She continued.

"Oh... okay I have been saving. I have several piggy banks full of bits" Fluttershy offered.

"Several?" Rarity asked.

"Yes, I think I have saved up over 100,000 bits in them". Fluttershy nodded.

Rarity gasped. "100.... thousand?"

"Yes, will that be enough" The pink maned mare asked.

Rarity had her jaw wide open at the offer. 100,000 bit would be equivalent to her working in the sex shop for 5 years. "But she was not going to be greedy and most of the money would go to Filthy's filthy pockets anyway.

"It's fine... I'll do it for 1000 bits" She offered, she did not want to rob her friend of her fortune". She would have to convince Filthy that she was nothing but a customer wanting help finding a stallion, not that it would be a very complex and difficult fetish to grant her friend.

"Oh, thank you so much, I will come back tomorrow with the bits" Fluttershy bowed at the wall. "Thank you so much for this?"

Rarity couldn't help herself, she had to ask.

"Why would you want this. To be kept as a helpless slave, to a strange pony?"

"Um.... that's my business, I don't think I have to explain myself do I". She replied a bit annoyed.

"No, you are absolutely right, it is none of my business, sorry for asking" Rarity surrendered.

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Another month had passed and in addition to doing her usual grind and coming up with excuses as to why her dress shop was open less. She went over sheets for client after client trying to find a good match for Fluttershy's request. None of them seemed suitable, stallions were not very common in Ponyville and all the ones that had visited her shop did not seem to be interested in a rape dungeon roleplay. They wanted steady relationships with healthy mares or they just wanted to be sadists or masochists for a weekend, not 'who knows how long' like Fluttershy wanted.

The bell rang and another customer walked into the room. She hoped it was a stallion and it would be a match for Fluttershy.

"Good morning, her disguised voice called out.”

"Hi, my name is Redblood, I am new to Ponyville.” said the stallion.

"That's fine, I don't need to know your name, I would prefer not to, every client should have complete privacy about their visit here". She replied. "Now what are you looking for?” The irony of the situation was that she recognised the voice of nearly everypony that came in anyway. If he hadn't said his name he may have been the only customer she didn't know personally.

"Oh um.... well, I actually know what I am looking for, it's a mare I saw on my way into Ponyville she had the sweetest little voice and she was singing to her animals. I was too nervous to approach her. I was just wondering.... if maybe she had a personal at this shop, I really like her".

Rarity gasped. "What colour was this mare?"

"She was a really pretty light lemon yellow and she had a gorgeous soft light pink mane.” He replied.

"Cutiemark?" She asked excitedly.

"Three butterflies" I think.

Rarity smacked her hoof down on her table in triumph.

"Yes!" she shouted.

"Huh?" The pony behind the wall asked in confusion. "Yes that pony has a personal here or..."

"Ah.... I'm sorry that was unprofessional of me I'm not suppose to divulge clients that visit here to others, unless I match them, but...." Rarity began.

"Are you saying she is looking for a stallion then?" Redblood asked excitedly.

"I can't say, but fill out this form with your details and come back in a week, I think I can help you, however....".

Redblood takes the form that she slides through the slot and begins to fill it out, holding a pencil in his mouth. But then Rarity decides to break protocol.

"Ah forget the form" She submits. "You want that yellow mare right?"

He stops filling the form and looks back up at the security slit the strange artificial voice is coming from.

"Yes, she's incredible". He answers hopefully.

"Okay fine, I can organise something for you two, but there is something you need to know about what she actually wants in a stallion".

"Um ok... What's that" he asks.

"That seemingly innocent little mare, is very very kinky, she wants something way more then a one night stand or even a relationship" Rarity begins to explain.

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"Butterflies, Butterflies, Butterflies"! Fluttershy continued to shout out.

"Fine fine, I heard you the first time" Redblood called out to her.

He moved away from Applejack and signalled for Latex pony to put her back in the cage.

Latex pony nodded and gave a sigh of relief. She teleported the Earth pony back into the cage and removed all her bondage and the gag, then turned to Redblood.

"You took this way way too far!" She shouted at him. "You had no right to touch any of her friends like that" Her gravelly masculine voice sounded out loudly.

Fluttershy looked at the disguised pony in surprise.

"W...Wait a minute, I recognise that voice!" She calls out.

"Yes Fluttershy I was the one who helped make this happen for you".

"You know my name?" She squeaked, "and thank you I have had so much fun" She grinned and clop her hooves.

"There is something all of you should know". Latex pony said cautiously.

Everypony looked at her expectantly wondering what she would reveal.

She sighed as she took hold of her collar and started to undo it.

"Please girls, don't hate me, but I have a secret I have been hiding from you all. you too Redblood".

The latex pony pulled her collar off and then began to remove her mask. Applejack, Twilight, and Fluttershy gasped when they saw the white coat and purple mane. It was their best friend, the element of generosity, Rarity.

"What!" Twilight screamed angrily. "Why why would you help that horrible pony?"

Fluttershy giggled "Oh my, you could have told me Rarity.”

Applejack looked dumbfounded. "What in apples n' oranges just happened.”

Redblood could feel the tension in the room and had guessed what was causing it. "Oh... I take it you all know this pony?"

"She.... was... our best friend" Twilight replied angrily.

Fluttershy was the one to speak up. "Girls, listen. I was never in danger and I had a way out any time I wanted by just saying butterflies, it was my safe-word, in case things got out of hand". The yellow filly looked at Redblood intently. "Which they sure did! You should be ashamed of yourself, forcing yourself on a pony that doesn't want it".

"Fluttershy I was just doing what you asked, you wanted me to deliberately try to push you to use the safeword, you said you didn't care how much pain you went through, you would never give up until you were rescued". Redblood defended himself.

"I said you can do whatever you want to me, not to my friends" Fluttershy shouted her voice suddenly fierce and loud.

"I'm sorry, I did get carried away". Redblood sunk his head down.

Rarity pet him on the back. "I think this has taken a toll on all of us, thank Celestia it's over now, you two are the most difficult customers I ever had".

"If you really aren't a bad guy I want you to let us go right now!" Twilight shouted at the black stallion.

"Agreed" Applejack nodded.

"Not just yet" Redblood shook his head. "I still think that purple pony is going to kill me as soon as she gets the chance.

"I am very angry at all three of you" Twilight nodded. "Fluttershy! you made the entire town worried sick, Rarity, you should have trusted your best friends with a secret like this, we wouldn't have judged you for it and Redblood.... I.... I have no idea what to say about you. I was very angry at you because I thought you were hurting my friends. I thought you had ponynapped Rarity, Rainbow Dash, Applebloom and Sweetie Belle as well. Even Celestia has inexplicably gone missing.

Rarity sighed. "That was me, I ponynapped Applebloom and Sweetie Belle, because I wanted to keep them safe and ignorant of this whole thing, they nearly found this place and well it's my job to silence any witnesses. I knew it was going to end soon, I wasn't going to keep my sister locked up for long.”

Applejack was relieved Applebloom was okay, but the questions flowing through her head were hardly satisfied.

"Ah still don't get it" Applejack interjected. "How is your magic so powerful and What happened to Rainbow Dash"?

The door to the basement opened and a sky blue coated pony with a rainbow mane flew in and hovered in the air. "Did somepony say Rainbow and Dash? Ah yeah!”

"Rainbow!" Everypony in the room except Redblood and Rarity gasped in surprise.

"What are you doing here?" Twilight asked. "Why did you never come back to Ponyville".

"Because I was ordered not to come back to Ponyville, Twilight.”

"What? By who?" Twilight asked with a demanding tone.

"By me, my faithful student" Princess Celestia ducked into the room, her large stature not quite fitting through the doorway easily.

"Princess Celestia!?" Twilight and Applejack spoke out in surprise.

"Hello my little ponies". her sweet majestic voice said.

"Princess! Please can I finally spill the beans!" Rainbow Dash shouted in excitement. "I can't contain myself".

"You may Rainbow Dash" Princess Celestia nodded, "there's no need to keep secrets any more.”

"Awesome, so you want to know why I stayed in Canterlot girls, let me explain" The rainbow maned mare cleared her throat.