The Mistress' Slave

by Scratch Fever

Rating: mature
Tags: Rarity, Princess Celestia, Sex, My Little Pony: Friendship is Magic, Romance
Length: 8350

Celestia's private time is interrupted by Rarity

Celestia is debating whether or not to attend the Grand Galloping Gala as usual... but perhaps, as her assistant points out, she should vary things a little.

Perhaps a dress?

A story for: Warmaisach
Thanks to: Midnight Dancer for proofing and pre-reading

Published 2013-08-19 23:40:01 UTC
Last updated 2013-08-19 23:40:01 UTC

Chapter 1

The Mistress’ Slave
By Scratch Fever

***

Princess Celestia sighed, levitating yet another scroll and carefully placing it over the growing pile of documents needing her signature for the upcoming Grand Galloping Gala.

Her assistant for the day, a cute young mare named Scribbling Pen, sporting a pink mane with red highlights and a white coat of fur, looked up from her desk. "Is everything alright, your majesty?"

Celestia smiled. "It's fine, Scribbling Pen," she said with a chuckle. "I'm just a bit tired of how... repetitive things are on my end for Gala preparations. With Luna back it's a bit more off my shoulders, but I still end up doing the same thing year after year."

Scribbling Pen blinked, but nodded before a slight frown crossed her face. "But, last time the Grand Galloping Gala was a disaster!"

Celestia chuckled. "A much-needed disaster, Scribbling Pen, one that we can sadly not repeat this year, lest noble house hostilities for my beloved student become more overt..." She trailed off and sighed. "But I still want to do something a little different this year. Nothing extreme... just... different."

Scribbling Pen nodded, looking thoughtful. "Pardon my forwardness, your highness, but, do you always look the same when going to the Gala?"

Celestia tilted her head. "What do you mean, Scribbling Pen?"

"What I mean, your highness, is that the Gala has a long-lasting tradition of allowing ponies to express themselves in more than words and polite greetings," Scribbling Pen elaborated. "I’m sorry if this sounds impertinent, your highness, but ponies do consider it worthwhile to obtain new jewelry, or even spend bits on new dresses."

"Well, my Royal Regalia is my usual fare," Celestia admitted with a smile. "It's comfortable, after all."

Scribbling Pen nodded once more. "I understand that, your highness, but well...” She hesitated. “What I'm trying to say is, you do a lot for us, from the poorest to the richest, planning, signing, checking the budget...” Scribbling Pen shrugged. “Sometimes you have a pony like me to help with the menial tasks, but most of the time you do it on your own, and as much as we all appreciate it, you don't spend enough time on yourself."

Celestia raised an eyebrow. "I see."

Scribbling Pen smiled sheepishly. "I'm sorry if I'm being too blunt, your highness, but is it too bad to leave some more work for me and, I don't know... get new jewelry you like just for this one Gala? Or even a dress? Aren't you visiting Manehattan tomorrow? There are hundreds of boutiques and specialized designer stores that would simply love the chance to do something for you."

Celestia mulled over Scribbling Pen's words. "Jewelry... not jewelry, I have plenty... but yes, I think... I think I would like to have a dress of my own for this Gala." She looked at her assistant. "Are you sure you can handle a little more work, Scribbling Pen? I don't want to put too much on your plate."

"Don't worry at all, your highness!" Scribbling Pen replied with a smile. "It would be my pleasure to help you have just a bit more time for yourself."

Celestia smiled. "I know just the mare for the job as well, and... thank you, Scribbling Pen," she said, suddenly feeling so much better.

Scribbling Pen blushed slightly. "It's my pleasure, your highness, I am after all, your assistant for the day."

Celestia laughed. "Perhaps it's time I choose my next full-time assistant," she said, levitating another parchment. "Be sure to put in your application for a full-time position."

"I-I will!" Scribbling Pen stammered, eyes wide.

The pair remained silent for a few minutes, the monarch reading and signing, the assistant dumbstruck. Finally, Scribbling Pen shook her head and with a smile went back to work on the minutae of large-scale celebrations.

***

Rarity bent over her desk, carefully drawing a flowing line, the latest addition to her latest design; a flowing summer dress that would simply look delightful on Fluttershy, or it would if she changed the colors.

She could just imagine how stunning Twilight would look in it, although both would need a hat to go with it, which was, in itself, the most challenging part now that the drawings of the dress were finished.

She set down another large page and started drawing a first draft. A wide brimmed hat would fit Fluttershy perfectly, her long mane would fall just the right way to make her shyness look more like teasing. It would have to frame her face, and combine with her coat perfectly, decorated in such a way—with flowers, perhaps—that her ears would be just as flattering towards the whole design... Fluttershy was a beautiful mare, after all, and using her natural shyness to emphasize that beauty was a delicious challenge for the fashionista.

She levitated another page, setting in on top of the other two. Twilight, on the other hoof, needed something different. Not that she wouldn't look simply adorable with a wide-brimmed hat, but Rarity was not aiming for cute, she was aiming for sensual. First of all, the obvious differences needed to be taken into account. Twilight's horn needed to be part of the design, something to make it look much more impressive and sexy, it was really a nice horn, but Twilight never did anything with it, preferring to simply have it poke from within her mane. No, it would not do to just make a hole on the hat and fit it through. This hat would make it look slightly longer than it was, much more regal, befitting her place as Celestia's chosen disciple.

The hat would have a few decorations on the front... maybe an engraved design? Rarity considered it, biting the back of her pencil thoughtfully and nodded, drawing a few swirls. "Maybe that would work..." she thought aloud, biting her lower lip. "Or, what if I—"

She was interrupted by urgent knocking on the door. Groaning in frustration, she straightened and pushed away from her desk before trotting towards the door. "I'm coming!" she paused briefly to take off her glasses and quickly brush her mane into something resembling her usual style before finally making it to the boutique's entrance.

"Welcome to the Carousel Boutique" she said, opening the door. "Where everything is— Oh, Spike! How nice to see you, darling!"

Spike smiled lovingly and nodded dumbly. "I-It's n-nice to see you too, Rarity!" he managed to stammer, eyes turning into little hearts.

Rarity giggled. "I'm sorry I'm not inviting you in for tea, Spikey, but I am in the middle of designing a dress and I don't have too much free time, what can I do for you?"

Spike nodded for a second, the goofy smile never leaving his face until the words registered. "Oh!" he said, straightening up and giving Rarity an apologetic look. "I'm sorry, Rarity! I actually have something for you!" he lifted his claw, showing her a rolled-up scroll bearing the royal seal.

"Oh, no, is something wrong, Spike? Does the princess need us?" Rarity asked, her magic quickly enveloping the scroll and opening it for her to read. "Oh... oh... this is..." She gulped. "This is... h-how long have you had this?"

"Um..." Spike cringed. "I'm sorry, Rarity, it arrived really early today and I was completely passed out from hanging out with the Crusaders all day yesterday... it rolled under Twilight's bed and I didn't see it when I woke up... so..."

"But... I-I that gives me about thirty minutes before Princess Celestia..." Rarity stammered before a royal trumpet announced the approaching carriage.

"Aaaand..." Spike gulped. "That's something I wanted to tell you, Princess Celestia always arrives a bit early."

Rarity gaped. She took a step back into the boutique and looked at the mess inside. She turned to look at Spike, levitating him and running inside. "Help me put all of this away!" She said urgently. "Don't worry about the silk, just roll it and put it over there with the other fabrics!" she ordered, using her magic to have several brooms sweep the floor of debris. She then proceeded to clean up her desk, stacking her designs into a neat pile while water was poured into a teapot and set over the stove. She quickly ran to a mirror, barely paying attention to Spike running back and forth behind her, carrying several rolls of silk on his arms.

Already taxing her magic with the cleaning, she focused on having her coat brushed clean, and making her mane much more presentable than it was. That's when she heard the first knock.

Putting the brushes down, her magic levitated a box containing a variety of cookies and treats, ripping it open and setting the contents down on a plate in the middle of her table. Casting a quick glance around, she heard a second set of knocks and realized that she didn't have time to do anything more and sighed, helping Spike set the last of the silk in place.

"Thank you Spikey, you can go back to the library now," Rarity said, then turned and called. "I'm coming dear!"

She opened the door only to look up at the smiling face of Princess Celestia. "Hello, Rarity," the Princess said, stepping into the Boutique with undeniable grace. "I apologize for being a little early, but my trip to Manehattan will require a little more work than I anticipated and I found that I needed to rush things."

"Oh, not at all, Princess!" Rarity said, bowing, while Spike quickly walked out. "My time is all yours."

"I'm glad to hear that, my little pony," Celestia said, smiling kindly. "I won't take much of it, given the urgency of my trip, but I would ask you to spare a few minutes to discuss the upcoming Grand Galloping Gala."

"Why, certainly, Princess!" Rarity said, motioning with her hoof towards the table. She levitated the pot and prepared the tea in her best china. "Would you like some tea and cookies while we talk?"

Celestia grinned. "I shouldn't, I have to watch my figure... but I don't see the harm in indulging in a few tasty treats."

The pair sat down while Celestia's guards stepped outside. After eating a few cookies and complimenting the tea, Celestia finally spoke up. "As you well know, the Grand Galloping Gala is coming up in the next couple of weeks. I have decided to change things a little bit and get a dress for myself," she said, looking levelly at Rarity, whose eyes were growing wider and wider. "I would like you, Rarity, to design and make a dress just for me, I will leave the materials and adornments in your capable hooves, and you should not have to worry about cost... I can afford it."

"Oh my... Princess..." Rarity gasped. "That is.... that's simply.... I'm honored! But perhaps a more famous pony would better suit—"

"I don't need a famous designer, Rarity," Celestia said, raising a hoof as she spoke. "I only require a pony I can trust, and there are few ponies I can trust just as much as my faithful student and her good friends."

"Why, Princess, thank you so much!" Rarity said, her eyes gleaming. "I'll be delighted to design your dress! Why, I already have several ideas! We can get started right now and—"

Celestia giggled. "Now, now, my little pony, let's not get ahead of ourselves. "I did say that I had a lot of work to do in Manehattan today, as it is, I'm running a little late," she admitted, sipping some tea and not looking worried at all. "But, I can't have them waiting all day. How about you visit Canterlot in two days time, at around say... five? And we can take all the measurements you might need as well as discuss styles and share some tea?"

"I... I would be honored, Princess," Rarity said.

"It is agreed then," Princess Celestia said, her eternal smile seeming to grow just a bit. "You will of course, stay at the Castle," she added while she stood up. "And I would be delighted to have you for dinner. I'm sure Luna would also like to talk to you, since she hasn't seen much of all of you the last few months."

Rarity nodded, walking the princess to the door. "It will be a delight to talk to Princess Luna again," Rarity said with a smile. "Please give her my regards and I will see you both in two days."

Once the Princess was gone, Rarity slowly closed the door behind her, took a deep breath, turned around, closed her eyes and collapsed into her sofa, which she summoned at the last second. "This... is... the best. Possible. Thing!"

***

The Friendship Express rolled to a stop in front of the train station, and Rarity could barely contain her glee as she literally skipped out of the train. Not only was she in Canterlot on business it was business for Princess Celestia herself! There was little that could best that in a resume, other than perhaps finding the opportunity to make a dress for Princess Luna as well! One royal wedding gown, one royal Gala gown and... whatever type of gown Princess Luna would want. Let's see any of Hoity Toity's designers do that!

She levitated her bags and looked around, immediately spotting the guard carrying a sign with her name on it. "Hello, good sir! I'm Rarity."

The guard, a black-coated unicorn with a stern look gave her a considering glance before nodding solemnly. "Lady Rarity, Princess Celestia bids you welcome and asked that I take care of your luggage while you enjoy our beautiful city."

Rarity couldn't stop grinning at being called 'Lady Rarity.' She rather liked that. "Why, thank you, kind sir!" she allowed him to take her luggage in his own field, and ignored his sudden grunt of surprise as the weight taxed his magic. "I know my way back to the tower, so I think I'll go ahead and roam around Canterlot," she said with a giggle. "Celestia knows it's been awhile since I was here!" She used her magic to levitate her purse and binder full of dress designs from the luggage before smiling pleasantly at the guard.

"U-understood!" The guard gasped, slowly making his way out of the station, knees buckling under the weight of the bags.

"Do be careful darling," Rarity called, "I have some equipment there that might break if you let it drop! And it would be a bit expensive to replace here!"

His only reply was a stammered, "Yes, my lady!" But it was enough for her. Canterlot guards were renowned for their diligence.

"Well then, where to start?" Rarity mused aloud before she looked in the direction she knew she would be heading within seconds. She snickered. "Shopping! of course! Oooh so much to do!"

Still in the best of moods, she made her way to the shopping district, and soon enough was perusing several of the stores there. Most of the boutiques there had nothing impressive by her standards, but she made a point of going in in order to see what new materials and designs might be upcoming in her competitive scene. There was little of note dress-wise, so she took to the fabric stores, which for the most part were pretty much the same, nothing interesting at all except some new fabrics from Saddle Arabia.

Already ideas were forming in her mind of possible designs that would take advantage of the quality of the materials and help accentuate Celestia's natural beauty. Something that reflected her status, obviously, but also reminded everypony that looked at her that she was the incarnation of the sun itself. It would be glorious!

Rarity gathered a couple of rolls of fabric and went in search for the right type of thread she needed to use. Five different colors... but the quality had just as much to do with the final result as the aesthetics. There was no way she would make something sub-par for the princess.

She made her way out after buying the fabric (enough for two or three dresses) and thread. She looked around, taking in the different shops and houses around her. There was little else to do at the moment, other than perhaps... her eyes drifted back to a store she had initially dismissed. Could she? Dare she? She glanced around her, but everypony seemed to be doing their own thing and nopony seemed to recognize her.

Stealing a quick peek at a clock at the top of a store just across, she figured she still had a couple of hours to burn. And she intended to make use of however much time she had to get what she wanted. With an impish smile, and a silent promise to hide her purchases at the tower very carefully, she quickly entered the store...

"...oh my."

It was an hour later that Rarity stepped out, her one bag turned into three bulging ones of carefully wrapped purchases.

If anything, the grin on her face had grown to Pinkie-like proportions and her giggles drew the attention of more than one mare or stallion.

Rarity had to quickly move away from the store to— her breath caught in her chest when she saw the clock across from her... she was late!

She looked around in a panic until her eyes settled on the castle. She glanced at her bags, then back to it. No... she couldn't... she wouldn't be late. All she needed to do was leave everything packed in her bags. She nodded to herself as she started to gallop as fast as she could. There was no way she would disappoint the Princess and ruin her own reputation by arriving late!

***

"Hey, Quarter Hour," Ordinary Repeater, a brown-coated unicorn stallion called, walking into the clock shop. "Your clock outside is running fast again!"

"Oh, come on!" Quarter Hour, who sported a light green coat and glasses groaned. "That's the third time this week! How fast?"

"Well it's three hours ahead!"

"But, I just fixed it about half an hour ago!"

"I keep telling you, you should keep an eye out, might be some of the local unicorn kids messing with it just to annoy you."

Quarter Hour shook his head. "You know I can't, making my clocks requires all my attention.”

Ordinary Repeater shrugged. "Fair enough. I'll fix it for you, but you should do something about it, nopony wants a bad reputation in this town,” he pointed out. “And if your clocks are not on time..."

"I know, I know, thanks for telling me! At least everypony here knows not to trust that one."

Ordinary Repeater nodded. "Yeah, wouldn't want to freak out anypony."

***

Celestia's forced smile didn't disappear after Prince Blueblood slithered back into the crowd of ponies. Seldom did she allow such vipers into her court, but the noble houses of Canterlot did have a certain amount of power and never hesitated to use it for their personal benefit. It was a shame that she was distantly—very distantly—related to Prince Blueblood at all, but part of the noble's power-games relied on tracing family lines as far back as they could in bids to prove their closeness to either herself or Luna.

Speaking of which, it was roughly time for her sister to make her appearance. Celestia allowed herself a small, true smile. While she was a bit more political and—dare she say it—kind to her little ponies, Luna herself was much more accustomed to the direct and often brutal approach they shared a thousand years ago. More than once she had hid herself amongst the petitioners only to see Princess Luna flat-out deny any noble anything as long as it did not benefit Equestria at large to her liking.

As if on cue, the doors to the Throne Room opened, allowing Princess Luna to step regally into it with measured steps and head held high. Her eyes scanned the crowd of bowing ponies briefly, taking note of which nobles were around as well as the usual court-pests. She barely allowed her distaste to show before she looked up the stairs to Celestia.

"Sister," She declared regally, with a short bow, "I have come."

Celestia nodded with a smile, slightly bowing her head in acknowledgement. "Thank you, Luna," she said, slowly standing up, and forcing the attending ponies to remain bowing. "I leave the throne in your capable hooves for the rest of the day and night," she intoned in an official-sounding tag out for her sister to start officiating from that moment forth.

Luna met her halfway down, whispering quickly. "Enjoy your break."

"Thank you, sis," Celestia whispered back before the pair exchanged places.

Once she was all the way down, Celestia turned and bowed to her sister before leaving the premises. The moment she was out of the room and out of sight of petitioners, she let out a long sigh. She was free.

Celestia started walking at a leisurely pace towards her chambers, briefly stopping to acknowledge guards and castle employees, who wouldn't take her time for anything other than a polite hello, understanding that she needed her rest or to work on important projects. Celestia noticed a couple of guards, male and female quickly steal a longing look at each other before noticing her presence, but she pretended that nothing was amiss... after all, after so many centuries she understood the need for that passion and that love... it was fleeting, sometimes made to be more than it actually was, but such a delightful experience for the soul... she had witnessed it many times. Just... not been part of it herself.

Her thoughts drifted a bit, as her hooves took her towards her objective. It had been... so long. She was far too impressive, too unreachable now for the regular ponies to feel comfortable with. To some, despite her best efforts to dissuade them of the idea, she was a veritable goddess, incapable of 'impurity' or the needs of regular ponies. To others, she was too far away... too knowledgeable, too in control, when what she wanted was to not be.

Others loved her as a mother-figure. Certainly most of the guard. Twilight. Cadance. Not that those two were in her thoughts when a life-companion was needed, but... they certainly did treat her more like a mother than anything else. And lastly, there were those who would definitely love to bed her, the nobles and business ponies that fancied themselves not only her equal, but her superiors in their relative inexperience and short lives. They would jump at the chance, not because of her, mind, but because of her power.

Celestia shook her head, her lips twisting in distaste. There were very few things that would turn her off more than thinking of those clowns in bed with her and congratulating themselves for achieving a life-goal of some sort in their assumed capacity to take over Canterlot. Celestia shuddered, forcing her thoughts away from them. She wanted to relax, to feel like herself again, not dwell on the misery some ponies could bring due to—

She was doing it again. She forced her thoughts to concentrate on other ponies. On Scribbling Pen’s cute face when she pouted over a tax form, or The Element of Honesty's strong form. Or her brother, Big Macintosh. Yum.

With an impish smile growing on her face, she finally reached the hallway to her chambers, guarded as usual by two guards. "Fire Stuart, Steady Spear," she nodded at each. "Please make sure that nopony disturbs me."

Steady Spear cleared his throat, drawing her attention.

"Your majesty, you asked us to remind you about Lady Rarity's visit today."

"Ah, yes," Celestia smiled. That was another pleasant thought. That mare was delicious.

"Your majesty?"

"Ah," Celestia blinked and looked back to Steady Spear. "I'm sorry, I was distracted." She considered the time, something she was keenly aware of and nodded. She still had about an hour, perhaps an hour and a half before Rarity would arrive. But she did not want any other interruptions. "Lady Rarity is, of course, the sole exception. Please let her through once she arrives. She should be bringing several rolls of silk and other packages, so don't bother searching her. But other than her, or my sister, do not let anypony through."

Both guards saluted, and carefully shut close the doors after she had entered her hallway. She gave Steady Spear a silent thank-you as she walked into her chambers and closed the doors behind her again. He had given her even more pleasant thoughts to think about. After all, it was not everyday you would have a mare like Rarity fussing over you, and you alone.

She took a deep breath, letting every little detail that bothered her fade away before she stretched her back and wings as much as she could, working out the kinks in her muscles as she pranced around her room, horn aglow, levitating out everything she would need for the next hour.

She giggled as the objects proceeded to float around her in orbit. Oh, she loved this, so much. She remembered the first time Luna had caught her. The look of panic in her sister’s eyes, just before it dawned on her exactly what was happening had been priceless.

Luna had given her a bit of a hard time, teasing her a bit, but not too much. She had her own kinks after all... although they were not latex.

Celestia grinned as her red latex socks slid deliciously over her fur, encasing all four of her legs halfway up past her knees. A latex corset settled around her wings, pulling them close and trapping them as it tightened just right and the straps from the socks attached to it. Celestia couldn’t help but moan at the constricting feeling... the restrictions already in place making her feel just slightly out of control... but not enough.

She levitated a bit-gag and secured it in her mouth, as she slowly climbed on top of her bed and laid down on her stomach. She secured a set of metal rings at the base of her tail, which then attached to the base of her corset, keeping her tail up and allowing any potential viewer a clear picture of just how horny she was getting.

Her thoughts drifted to her guards. Could she call them in? Celestia moaned and stretched in her bed at the thought, but her magic did not falter. Four ropes tightened around each of her legs, forcing them closed, each tied separately but making it unable for her to stand. She would remain kneeling for this, as should be. She would be able to spread her legs to grant access, but little else. And really, what else did she need?

Celestia’s breath became quicker at the thought of a pony—any pony—looking down at her, tied, unable to raise to her hooves, and only capable of looking up... she closed her eyes at the image, feeling her strong collar—a large piece of hard rubber that kept her neck in one position only—tighten around her and lock, and shuddered. She was already wet at the mental image of somepony standing proud in front of her while all she could do was serve their needs.

She was almost ready. The last few items still floated around her, ready for use. Having been doing this for awhile, she knew which precautions to take when she finally denied herself control of the situation. Her magic levitated a magical resonance stone. A key, for all intents and purposes for her final addition. Looking up, straight above, she levitated it to the ceiling and encased it in just the right amount of ice... it would last roughly for an hour before melting completely and letting the small stone fall onto the bed.

Already salivating around the bit, she used her magic to put a pair of red latex blinkers on top of her eyes, encasing everything around her in reddish darkness. Her next step was almost as mouth watering by itself without the need for a gag, and yet, it was just the tiniest part of the true experience. She magically activated her dildo, and slid it in as slowly as she could.

Her eyes rolled back and her magic grasp on the last piece—the most important piece—almost faltered. She moaned. She gasped and sighed... inch, by ribbed delicious, vibrating, hard and warm inch, the dildo slipped into her, her vaginal muscles clenching and unclenching around it... it was just the right size to make her feel full, and yet wanting more... and the vibrations, oh Faust, the vibrations... she shuddered, trying to control herself just for the last piece...

The magic inhibitor was a tube-like magical artifact originally designed to keep captive unicorns from escaping imprisonment with their magic. It had become really popular just after its invention amongst several nobles and their spouses... and Celestia had loved it from the moment she had set eyes on it. But not exactly for the same reasons as its inventor, one Hard Lock, had imagined. They were different times, and yet Celestia’s mind had immediately seen the possibilities.

And now, this was the last piece to go on. She levitated it carefully, struggling to keep her focus as her vagina flooded her whole body in pleasure. The moment she felt it was in place at the top of her horn, she let the magic go. It slid down her horn like the lips of a lover, negating her magic on its way down until she was completely devoid of it.

She was powerless. She was tied up and barely able to move. She had no control, no way of removing the magically vibrating dildo inside her pussy. Her tail was raised exposing everything that was happening to imaginary viewers ... she had literally no control over what she could do or feel for the next hour. And she absolutely loved it. Her mind conjured up images of a featureless stallion, slapping her face with his dick, demanding that she remain completely motionless, despite the vibrator and the dick on her face.

And she complied. There were others there in her mind's eye. Sophisticated ponies, males and females, behind her sipping drinks and cocktails while admiring her asshole and the vibrator in her pussy. A mare, wearing a mask, would approach and lick her, just for fun, before returning to the conversation while another gentlecolt approached and caressed her nether lips with a hoof, much like one would caress the soft fur of a pet.

She was nothing but a decoration... an object to be used with no will of her own other than to feel the pleasure of pleasing her masters and mistresses. Her body shook with the first of many orgasms to come, but she forced herself to remain still. Because her masters had demanded that she not move. Her breathing, which had been going faster and faster, calmed down as she assumed the state of mind her mas— was that the door's lock twisting?

Celestia's eyes went wide behind her blinkers as she struggled with what to do. Somepony was trying to get into her room! And she hadn't locked the door, confident that her guards would follow orders! She was going to kill them!

Desperate, Celestia did the only thing she could think of doing, she rolled to the side and fell on the other side of the bed, which protected her from view by any pony. How was she going to explain this? If it wasn't Luna...

"Hello?" a very familiar voice called.

Oh no... it was Rarity! What was she doing here?! She was at least forty minutes early!

"Princess? I'm sorry I'm late but... Princess? Are you here?”

I'm not! Go away! She thought furiously, hearing the pony approach. She had to... oh no... her dildo... oh Faust... it felt so good but it was... sliding out and, oh Faust it just felt...

***

Rarity rushed into the castle with nothing in mind other than making it in time. Once inside though, she slowed down into a comfortable trot. After all, it wouldn't do to arrive all flustered into Celestia's chambers. Knowing the princess as well as she did, she knew that Princess Celestia would be kind and forgiving; she wouldn't mind at all if Rarity did not look her best.

But Rarity herself would. And that was something she would be unable to forgive herself for.

Her breathing slowed down. Her magic was less taxed than it had been while dragging everything at high speeds, therefore she was able to stop for a moment and, setting her bags down briefly, cast a grooming spell on herself.

She allowed the spell to clean all the grime and dust from her race to the castle.

Another spell, with the aid of a handy pocket-mirror, allowed her to arrange her mane to her usual, fabulous look. Once again, Rarity, fashionista extraordinaire was ready to face the world... or in this case, the world's monarch. For whom she would be designing a dress.

She couldn't help herself.

She giggled at the thought. It was really all she could do not to burst down into megalomaniac laughter. Truly an achievement under the circumstances.

Gathering her bags in her levitation spell, she proceeded to prance towards Celestia's chambers, now fully refreshed and ready to spend a couple of hours doting on the Princess and presenting her with her designs. She only hoped the Princess would not insist on seeing all of her 'materials'. She slowed down as the hallway that would take her to Celestia's rooms came into view. She also hoped the guards wouldn't ask to check everything either. Or she might have some explaining to do.

"Good afternoon, gentlecolts," she said, putting up her best smile as she approached the pair of guards just outside the closed hall. "My name is Rarity and I have—"

"Lady Rarity," the guard to the left interrupted with a nod while pulling the door open. "We are aware of your appointment. Princess Celestia is waiting for you."

"Why, thank you!" Rarity replied, beaming him a smile that made him blush. "You are such a gentlecolt!"

She giggled invitingly, winking at him as she made her way through the open door, feeling their eyes following her and sure they had centered on her flank. With a quick glance behind, she caught them staring, and sure enough they hastened to close the door behind her. Rarity giggled again. She was such a tease. Had they known that she was... appraising... them as well, she might have to escape with the pair to a more secluded area. Perhaps it wasn't such a good thing that they hadn't demanded to take a look into her bags... but no.

Rarity shook her head, approaching Celestia's door. That would not do. Business first, fun second, after all. She would not allow a tryst to destroy future chances to design for the princess. As fun as they would have been. She politely knocked on the door and waited, but there was no reply.

Knowing that the princess liked to spend some time on her balcony, Rarity shrugged. Perhaps she had simply not heard her. Her horn lit up a bit more and her magic turned the doorknob, allowing her access into the room... which seemed to be empty.

Frowning, Rarity took a quick look around, but could see no sign of the princess. "Hello?" she called, closing the door behind her and setting her bags down to the side. When all she got in return was silence she ventured a bit more into the room. Surely the princess was in here. The guards would have advised her to wait outside otherwise. Perhaps the princess was occupied? Was Rarity too late?

"Princess?" She called again, eyes searching as she approached the center of the room, where the bed stood. "I'm sorry I'm late but... Princess? Are you here?"

When she didn't hear any sort of reply she shrugged. The princess was probably busy... but why would have...

"Hmmm..."

Rarity's brain stopped. That had sounded like... her eyes turned to the bed. Slowly, not believing she was actually doing it, she stepped onto the bed and walked on top of it—she hoped Celestia would forgive her but the curiosity!—until she could look down on the other side. Her eyes widened.

Celestia lay on her side, legs tied, wings trapped under a corset, tail held up leaving nothing to the imagination, mouth gagged with a bit and blinkers askew. She was looking at her, petrified.

"Oh, my! Princess! Are you—"

A drop of something chilly and wet falling on her back stopped her. Blinking, Rarity looked up at the ceiling, where a stone of some sort was suspended by ice just over the bed. Slowly, it dawned on her what was happening. Her eyes strayed down to Celestia's vagina, where a magically-vibrating dildo slowly finished sliding out, eliciting another involuntary moan from the princess, who could only struggle to smile sheepishly at Rarity, at a loss for an explanation.

Rarity's eyes went over the expertly tied knots, the strong collar, the latex socks, the tail ring, the magic inhibitor and the dildo. Her mind was ablaze with thoughts... all of them dirty, although she had never, ever expected to find herself in a situation like this. Although, if she were to be honest, she had fantasized about her goddess in more than one occasion. This was a once in a lifetime chance.

And so she took it, holding her breath.

"Oh, my... it seems a little slave has been trying to have fun..." she smiled, still nervous. "But you're doing it wrong, dear... you see, a slave is not truly a slave without her mistress."

There, she had said it. It was all in Celestia's plate now. Her goddess was staring at her with a look of utter shock, as if unable to process what was happening to her. Then, her eyes softened and she nodded.

Rarity grinned. "That's a good slave."

***

Rarity levitated Celestia and laid her down on her bed again, before smirking and levitating her bags with recently purchased items. "Well, little slave, let's see what your mistress has for you today..."

Given that Celestia was unable to talk, Rarity kept a careful eye on her for reactions, trying to read as best as she could what would be pushing the limits for her Princess.

First she pulled out a long metal stick with two rings on each side. Given Celestia's attire, it would be safe for her to use this one without any fear. "Slave," she snapped, glowering at the Princess, whose eyes widened. "Spread your hind legs."

Without even acknowledging the command with a nod, Celestia immediately followed her instructions, straining to open them as much as she could. Smirking, Rarity pranced behind the princess and attached the rings to the princesses' latex boots, keeping them separated. "Good slave," Rarity purred, casting a simple stimulation spell on Celestia's clit and asshole. "No moaning," she ordered, turning away and going back to her purchases while Celestia tried her best to not moan at the stimulus.

Humming to herself, she pretended to study the contents of her bags while also secretly increasing the pleasurable effects of her spell. There was a tiny whimper, which she pretended to not hear while she dug around the bags, looking for what she needed. When she found it she grinned, taking it out.

That's when Celestia moaned, her body shaking as the first of her orgasms hit her. Just as she was about to have a second though, the spell stopped, and her eyes were drawn towards Rarity who was shaking her head. "Hmmm... didn't I tell you not to moan, slave?"

Held in place as her neck was, Celestia could only manage to give her the barest of nods.

"Well then, since you moaned, I believe you should be punished," Rarity said, floating out a crop and using its tip to lift Celestia's face up a little, allowing her to see Rarity's smiling face. "Should you be punished, slave?"

Celestia whimpered, nodding as she felt her body shiver in anticipation. She could feel her pussy juices flowing down her thighs, and the cool breeze caressing her lips and anus. She wanted it. So bad. To be punished... like the bad filly she was.

Rarity slowly made her way around Celestia, tracing her way with the crop. Down Celestia's neck, her back, putting just enough pressure so she could feel it as it passed over her corset, until it reached her rump.

Celestia held her breath, eyes wide, mind blank... when was it coming? The first hit?

That's when she felt... something else. It... felt smooth, like her magical dildo... but it was just touching the entrance to her wet pussy. She moaned again. She needed it. Something inside! And then another... this time pushing into her anus just the tiniest bit. A double dildo!? But...

SMACK!

Celestia's head raised in ecstasy when she felt the first sharp, stinging pain on her rump. She bit down on her bit, forcing herself not to moan or whimper. She felt the dildo pressing against her pussy hum magically into life, while the one pressing against her asshole followed suit. She couldn't help herself, she pushed back a lit—

SMACK!

"My, my!" Rarity cooed from behind her. "It seems you're not learning your lesson!"

Celestia whimpered and shifted a little, allowing the bigger of the dildos to slide deliciously up and down her labia.

SMACK!

Celestia's eyes widened and she couldn't help but moan once more.

SMACK!

"Hmm... I think that my little slave likes misbehaving!" Rarity pronounced, leaning forward to lick one of places where she had smacked Celestia's rump. The cooling sensation made Celestia's eyes roll back and her pussy to contract. It felt so good!

She was so distracted, she barely felt something sliding down to her teats and twisting them a bit, making them harder. It just added pleasure to her overwhelmed mind until something hard clamped on them. Celestia blinked. It wasn't entirely unpleasant but why would Rarity...

ZAP!

Celestia gasped, body convulsing in surprise, pleasure, and electricity as the magical nodes Rarity had clamped on her nipples activated for half a second. Celestia almost whimpered. Almost. But she held back. The Mistress had said that she should not moan. She hadn't said anything about whimpering but the message was clear.

She stood still, body quivering with expectation as R-her Mistress hummed appreciatively.

Celestia's blinds only allowed her to look forward, so she could only trust her other senses to figure out what her Mistress was doing, but between the dildos humming against her asshole, her pussy and the clamps on her nipples threatening to activate...

She felt the caress of her Mistress' spell on her clit once more, she felt her pussy convulse, the urge to push back and bury the dildo... both dildos deep inside of her and let them hum and vibrate her into an sun-shattering orgasm... her legs tensed when the spell made her all tingly the moment it reached her asshole. It felt like the softest of feathers tracing around the rim, while the dildo pushed just the tiniest bit in.

She resisted the urge to push back with every single bit of willpower she possessed. And by the sun and the moon it was harder to remain still than move the celestial bodies. But she did. A millenia of practice by herself had helped a little.

"That's right, my little slave," her Mistress whispered into Celestia's ear, her warm breath making it twitch. "You're doing good... remain still for Mistress Rarity..."

The intensity of the spell incremented, and had Celestia been standing on her own hooves, instead of lying on the bed on her belly, she would have fallen to her knees, there was only so much she could—

ZAP!

Eyes wide and rolling back, Celestia gave up as the most delicious, utterly mind-blowing, body-shaking, sun-shuddering wave of orgasms warmed its way through her clenching and unclenching pussy, making her back stretch as she lifted her head back and moaned through the bit.

She luxuriated in the feeling of pussy juices flowing out and drenching her bedsheets, the teasing pressure of the dildos, the smell of pussy on her muzzle... still shuddering from following orgasms, Celestia weakly focused on what was in front of her.

Tail raised, engorged vagina glittering with sweet juices, her Mistress bent in front of her, just within reach. At some point her bit had been loosened enough that Celestia knew she could push her tongue out, but not speak.

"Lick me."

The order was sharp, and needed no further motivation.

Still moaning, shuddering and feeling Mistress Rarity's spell in her clitoris along with the tingling sensation of electricity fading from her oh, so very hard nipples, Celestia dove forward, desperate to please.

Her tongue dug as deep as possible, the flavor of Mistress' Rarity vagina overpowering her senses, the smell of her arousal igniting the need for Celestia to push back and—

SMACK!

The magic faded, the tingling ceased, and Celestia's eyes snapped open in desperation.

"No, no, noooo..." Mistress Rarity sing-sang. "No moving back, slave. Stay where you are."

Celestia felt like whimpering. That pleasure, that unnerving need to have something—anything—inside of her was so tortuous. Still... she took a shuddering breath, and relished in the smell of her Mistress. It was so delicious... her tongue started working again, drawing a pleasured gasp from her Mistress. Celestia closed her eyes, concentrating on her task, body still as the magic started again, massaging her clit and pulling ever so slightly on her wet nether lips. The dildos hummed into life again, so close, and yet so far.

She felt herself shudder. She had to please her Mistress. Pleasing Mistress Rarity was all she wanted. All she needed. Even more so than cumming herself. Even more so than a thick cock inside of her... Celestia's body and mind needed—nay demanded!—she pleased her Mistress. Mistress Rarity had to cum and then, only then would she be rewarded.

It was then that she felt Rarity's body react. Her tongue was flooded by the pleasure of her Mistress and it tasted like heaven to her. Celestia betrayed herself and whimpered, stretching her tongue further in, around her bit... it was then that she felt the spell increase. No... s-she couldn't take another one not—

ZAP!

Celestia's moan was almost a scream of pleasure when this orgasm hit.

Her mind virtually imploded. If her corset was not made of such sturdy materials, her wings would have snapped it into shreds.

Her vision swam in front of her just as she felt her Mistress hooves raise her face, the bit fall off and the kiss... at the exact same moment both dildos pushed into her, humming and vibrating.

Tongues wrestling. Eyes locked. Her body tight and trapped, completely under the control and dominance of her Mistress. Celestia had never felt so much love, so much need for somepony. Her body melted into one, single shuddering mass of orgasms as the magical dildos alternating pushing in and pulling out. Her nipples were so sensitive and hard that each movement of her body sent extra shudders up her spine every time they caressed her bedsheets.

She pushed back towards her Mistress, trying to convey, somehow, what she was feeling... that her whole world, her whole being belonged to Mistress Rarity and Mistress Rarity alone.

Celestia felt something fall next to her and suddenly, the lock on her horn snapped open, allowing her magic to flow. She undid the ropes on her forehooves only to pull Rarity to her, sharing that passionate kiss and milking it for all it was worth. After what felt like several minutes, they separated a bit, eyes hazy and looking lovingly at each other.

Rarity's horn stopped glowing and slowly everything stop stimulating Celestia, and with a wet sloppy sound, Celestia's dildo slid out of Rarity's vagina. "That... Rarity... that was..."

Rarity nuzzled her. "Anything for my little slave."

Celestia returned the nuzzle. "I think... I think I might need more than one dress made..."

Rarity smiled. "Oh, my... but, Princess... that might take me more time, I couldn't possibly do all the designs in one night!"

Celestia's horn lit up as her corset and socks were slowly taken off by magic. "I believe the palace can accommodate you, Mist— my little pony," she whispered conspiratorially. "And I do believe that since you do oh so many... requests... for the Royal family, perhaps a permanent room can be arranged for you in the Castle."

Rarity leaned forward and gave Celestia a peck in the lips. "My Princess... it would be my honor."

Celestia, completely free of her implements, smiled at Rarity an unusual, unguarded smile. "And it would be my pleasure."

"Now," Rarity said, jumping down and summoning her other bag, "How about we take those measurements? I do have a dress to make!"

"I do have a special request for it," Celestia added as she stepped up next to Rarity.

"And what would that be, Princess?"

"Make sure it has some sort of corset."

Rarity grinned. "Oh, I will! I might have to stay longer tonight than intended, though.”

Celestia nodded. “Scribbling Pen,” she called, horn alit. “Make sure the rest of my appointments for the day are put on hold or transferred to Luna, if she can take them. I have… other projects that need attending.”

Her horn’s light died away and Celestia smirked. “We have all night.”

Rarity giggled. “No, my little slave… we have all the time in the world.”

*** The End ***