Author's Note

In case its been awhile and you need a refresher, here is a summary of the chapter, as well as a list of the kinks therein. Also, every chapter has been reedited for better spelling and grammer.

Chapter 1.
Twilight gets a spell cast on her by Celestia that gets rid of her heats but also makes it so that she can't cum unless Celestia allows it. Celestia abuses this privilege and fucks Twilight constantly.

Kinks. Foalcon, lesbianism, futa Celestia, Celestia being a bit of a jerk, a bit of public teasing, toy use. All chapters will include some element of denial as well as some minor bulging and cumflation.

Chapter 1

The mare squirmed, her legs pressed tightly together as she writhed at her desk. Foreign ideas and potent hormones coursed through her body leaving her confused and filled with wants and desires she had never had before. She breathed heavily, letting out a hot breath that made the pages of her book flutter. She could not read nor could she absorb the information in the book in front of her, and so she was forced to sit there staring at it hoping the heat would pass.

But pass it would not as there was nothing the mare could do, for each time the heat felt as though it was about to pass it surged to new life. With an exasperated sigh, the mare put a mark in her book and shut it firmly; venting her frustrations at the one thing that had always brought her joy.

This was not the first time this heat had beset her, and she knew it would not be the last; However, this time felt different from the others that came before it. The heat before had been able to be ignored, like the gentle reminders that Celestia often used to ensure she finished her work on time. Now it was more akin to that one fire-haired maid who worked at the castle; loud, boisterous, demanding, and always ready to remind Twilight when the mare had failed to clean her room properly.

The mare shivered at the thought, remembering well the previous lecture she’d received at the cruel hooves of that passionate pony.

In the end, the heat had grown so bad that even reading; which was the last bastion that had never failed to ease what ailed her, ultimately failed. With the walls of the final mental fort crumbling within her mind, the heat had won and the mare groaned in annoyance.

She couldn't help but give voice to her anger, for even the love of reading had been stripped by the heat between her legs. She chose right then and there that this heat was not something she could live with, not something she could abide and as Celestia as her witness she was not going to let it win this war for her attention.

With an empowering snort, she stood up, making sure to snuff the candles she had lit and draw the blinds she had opened. With a simple flick of her horn, the book was reshelved properly, next to all the other books she had on her immediate reading list. Next, she quickly tidied her room, which amounted to simply tucking away a few loose tissues and a candy wrapper she had forgotten about.

With that done and everything in order she nodded triumphantly to herself, before proceeding out of her quarters and into the hall.

First, she turned to the royal guard who stood ever vigilant outside her room, the stallion was old, older than most other guards and he had a kindly smile that never failed to disarm the young mare’s annoyance. Even now, when she felt at the end of her rope she couldn't help but grin back when he flashed her his signature smile.

“Hey little bookworm, out for a midnight stroll?” He asked kindly.

Twilight felt her lips move on her own and despite her anger, she felt a flicker of happiness burn within her, as she looked up at the guard’s smiling face.

“I’m going to see if Celestia’s awake, I have an urgent question.” She stated, in her very matter-of-fact, and definitely grown-up voice.

The guard nodded sagely, looking down at the young mare’s tight shoulders and confident expression. “It must be urgent indeed. Will you be returning tonight?”

She shrugged the same way she had seen some of her older, cooler classmates do. “Maybe.”

The guard nodded once more. “Alright, then little miss and if I don't see ya-”

“Good afternoon good evening and good night.” They both said at the same time.

The mare couldn't help but chuckle.

The stallion blinked, momentarily taken aback. “I guess I am a little predictable aren't I?”

“That's okay! Goodbye Grey Spear!” The mare called as she ran down the hall, towards the royal quarters.

“See ya!” He called back.

As he returned to his station he felt his nose tickled and he took a deep lungful of the scent only to recoil slightly. “Huh, well I guess she is old enough.” He muttered to himself.

Across the tower the mare stood silently, looking up at the enormous pair of double doors that made up the entryway of Celestia’s private room. Well, one of them anyway, this one was merely the one she used the most.

Beside the door two large imposing stallions stood stock straight, spears held tight to their shoulders and their gazes straight ahead. They knew well the young mare that stood before them and knew also that she was to be allowed entry at Celestia’s discretion. So they merely continued their watch, staring off into the distance while trying to ignore the smell that tickled their noses.

Twilight Sparkle was a decisive mare, many around the castle knew well the fire that burned in her, and though she was awkward in conversation she was also rather domineering at times. This was not one such time and she eyed the door with abject fear.

After one last deep, calming breath, she lifted her hoof and struck the wooden door twice.

Thunk, thunk.

Then, she waited.

After nearly a minute of painful silence, she heard the motherly tone of her teacher emanate from within. “Come in Twilight.”

The mare breathed in, then out. With a slight shove of her magic, the door was opened and she strode as confidently as she could into the room beyond.

Most of the lavish nature of the room was hidden in steep shadow, illuminated only by a few candles resting on the alicorn’s desk and at her bedside. Twilight knew well that the room had enough magical lighting to make it as bright as if they were under a noonday sun but it seemed Celestia was a little old-fashioned in that way and seemed to enjoy the soft illumination that the more natural candles give off.

The mare nearly jumped when she heard the door close behind her, a strangled eep escaping her throat.

Her mentor lifted her gaze from her desk and looked over the rim of her reading glasses at her student who stood nervously near the door. “Come here, my dear.”

The alicorn opened her wing, allowing the mare to trot up and slip into the alicorn’s tight hug. A hug that seemed to last a little longer than usual after the alicorn inhaled a lungful of a strange, somewhat nostalgic scent. “Um, Celestia?” Twilight muttered, through the alicorn’s tight hug.

Celestia shook her head and released the mare, seeing her in an entirely different light now. The alicorn noticed the way the mare’s tail flagged, the way her back legs quivered, how her cheeks burnt hot with desire. “Yes, what is it Twilight?”

“Um, I was just wondering if you knew a spell for something.” She looked down, rubbing her forehoof into the carpeted floor.

“I know very many spells, is there one in particular?” The alicorn grinned, leaning closer and breathing heavily through her nose. “Perhaps you want relief for your little, issue?”

The mare nodded eagerly. “I can't focus, I can't even read and it won't leave me alone!” She pouted, crossing her forehooves. “I just want it to go away.”

Celestia nodded. “There is one spell I can cast but it does have a very minor side effect.”

“Anything!” She begged.

A small, impish smile slipped onto the edges of Celestia’s smile and she couldn't help but laugh at the mare’s sheer desperation. “Stand perfectly still please.”

Twilight Sparkle instantly stood rail straight, grinning madly as she watched her teacher’s horn light with power. She forced her mouth shut, despite her nearly overwhelming urge to shout her glee for the world to hear.

After a second of channeling, the alicorn pointed her horn down, and with a blast of golden energy the mare was encased in a dull glow. The light faded slowly, sinking into the mare’s skin and finally disappearing entirely.

The mare stood silent for a moment, not feeling the effects of the spell for several seconds until her eyes shot open and she couldn't help but jump for joy. “Oh thank you, thank you, thank you!”

Celestia giggled at her young student’s enthusiasm, watching as she jumped up and down. The alicorn smirked suddenly. “I hope you aren't forgetting something.”

The mare stopped stock still mid-jump and scampered up to the alicorn. “I’m so sorry princess.”

The alicorn smirked. “Come here, my little student.” She whispered huskily.

The student did as commanded, approaching the alicorn until finally, their lips met roughly, with the alicorn pressing her body weight against the smaller mare as she deepened the kiss and slipped her tongue into her student’s mouth. Twilight couldn't help but melt, moaning as she felt the dominant older mare’s tongue slip into her mouth as a powerful hoof wrapped around her neck.

Seconds ticked past and soon enough the mare found her body completely encapsulated by the love and warmth of her mentor. Finally, after she felt as though she had no more breath left in her body, the alicorn released her. An odd expression crossed the mare’s face and her eyes were distant for a moment before she shook her head vigorously.

“Is that all, princess?” She asked.

The alicorn shook her head. “I’m afraid that took a little more out of me than I would like, so if you don't mind..?”

The mare nodded. “Of course.”

With a little wiggle, the mare scooted under the alicorn’s desk, with Celestia moving back to into the same spot she had been sitting in when Twilight had walked in. With minimal adjustment, she found a nice relaxing spot that allowed the mare a perfect angle, and so with a sigh the alicorn returned to her paperwork.

A few seconds later Twilight licked her lips and got to work as well.

The mare looked down between her legs, a frustrated groan building in her throat. She lifted her hoof from between her legs and wiped it off on the bedding. It probably wasn't the best idea to do that but at this point, she was far too annoyed to care about any potential ramifications for her actions. She glanced over at her clock and noted that it had been over forty minutes since she had started and still had not been able to finish.

She lit her horn and with a grunt, removed the long purple dildo that had been embedded inside her. With it's removal she breathed a sigh of relief, a sigh that quickly became an annoyed groan as she realized she was still incredibly aroused and still had no way of fixing that. Sure her heats were gone since Celestia’s spell had been cast but that didn't stop her from being plain hot and bothered from time to time. It didn't help matters that one of the very few female guards was outside her very room, a guard that she couldn't help but find attractive.

Twilight flopped onto her back, her limbs splaying in all directions as her magical dildo vanished without her concentration to maintain it. With a deep, resounding sigh she stared up at the ceiling, trying to think of why nothing had happened. Her health textbook had been very clear that orgasm was natural and felt good and it also included the fact that it happened usually within the first half hour or so. Yet here she was, on her second try that altogether counted for nearly two hours of near-constant masturbation.

Her room in the castle stunk, the scent of her need hanging thick in the air and seemingly covering everything and blocking out even the smell of the incense she had lit a while ago. With one last ragged sigh, she sat back up and made her way over to her ensuite bathroom. If this wasn't working she would just have to figure out why it wasn't and she knew one mare who knew just about everything.

A half hour later she stood once more outside the imposing doors of Celestia’s private room. The hour had grown late again but Twilight knew the alicorn would still be up, she didn't seem to need much in the way of sleep. Twilight wasn't sure if that was an alicorn thing or just a Celestia thing but either way, it made it easy to ask her questions because she was rarely unavailable.

With a bit more determination than last time, she reached out her hoof and knocked twice.

“Enter, my student,” Celestia commanded.

Twilight smiled, giving the two guards a small nod before entering their monarch’s private chambers.

This time the room was brightly lit and rather invitingly at that, with the alicorn in the corner of the room, her stance wide, and her horn ablaze with power. Before she was a blackboard so large Twilight was sure it had to have been teleported into the room. The alicorn’s face was scrunched up in concentration and Twilight quietly sat aside, knowing better than to interrupt Celestia’s private casting time. After a few more seconds in which the room had slowly grown hotter, the alicorn suddenly released a breath and the power fizzled, her spell work collapsing in on itself.

The alicorn shook her head and looked over at Twilight, her frown slowly turning upside down when she noticed the wide, stunned eyes of her most faithful student. “Good evening Twilight, how are you this fine night?”

Twilight shrugged slightly. “Not bad, I guess.” She rubbed the back of her neck awkwardly, unable to truly lie to her mentor.

The alicorn chuckled, pushing the blackboard away and sitting next to the much smaller pony, a hoof draping across the mare’s shoulders. “What bothers you this evening…” The alicorn sniffed the air, instantly realizing the source of her student’s discomfort.

With a knowing smile, she looked down at the fidgeting unicorn, watching as the mare’s face morphed from one of indecision to confusion. “I errr, well you see I was reading the health textbook when I read a particularly uh, interesting passage.”

The alicorn ran a hoof down the mare’s back, leaning in close in order to whisper directly into the smaller mare’s ear. “Interesting how?”

Twilight let out a shuddering sigh, the alicorn’s expert touch making the heat threaten to return. She grit her teeth and pushed down that feeling, choosing instead to save it until later, when she was alone. “I heard that a mare should be able to reach orgasm after approximately thirty minutes of sexual stimulation but well… I haven't been able to.” She looked up at the alicorn with wide, fear-filled eyes. “Is there something wrong with me?”

Celestia chuckled and shook her head, a cruel idea worming its way through her thoughts. “There is nothing wrong with you, in fact, this is the little side effect that I mentioned all that time ago.”

Twilight tapped her chin thoughtfully. “Is there any way to undo the spell rather than do it again when my heat comes?”

The alicorn sighed exaggeratedly. “I am sorry my student, but I can't undo the spell.” The mare’s face fell and Celestia could see a pout form on her lips. “But.” The mare blinked, looking up at her with sudden hope. “I just might be able to allow you to achieve orgasm.”

“Oh, really?” The mare grinned up at her teacher, her smile growing by the second.

“Only if you pass all your exams on Thursday.”

The mare frowned. “But that's when I have to do all the hard ones!”

Celestia shook her head. “Then you better study hard my faithful student.”

Twilight nodded confidently. “Right, thank you for your help princess. Is there anything I may do for you?”

The alicorn tapped her chin thoughtfully, a familiar crooked smile crossing her features. “Well, I was hoping to have a warm bath before bed, but it seems like my faithful student has gotten rather dirty as well.”

The mare’s cheeks lit up and she trotted towards Celestia’s private bath, giving the peeping alicorn a full view of her flagging tail, dripping cunt, and slightly parted lips. The princess licked her own lips and watched as her student trotted over to the door and turned.

“Should I run the large bath or?” Twilight asked nervously.

The alicorn grinned, her horn shimmering until the light coalesced around her crotch where a large stallionhood now appeared. The cock fell, bouncing slightly as a pair of balls appeared behind it, drawing the mare’s eyes and making her unconsciously blush at the sight.

“Oh yes, and while we wait to get clean, I think we could afford to get a little dirty.”

“Are you sure this is correct?” Twilight pleaded, trying every adorable trick in the book.

The older mare across from her snorted, leaning heavily on the oak desk and making it groan under her significant weight. “What are you implying?”

“N-nothing I was just wondering if you’re sure this was my final grade, I did just hand in a few assignments after all and I er…” The mare gulped under the teacher’s ire.

The older mare sat back, slowly shaking her head at the filly before her. “Twilight you are a brilliant mare but seem unable to grasp even the basics of art. Most of what you have done have either been so heavily inspired that I had to take points away or were outright copies.”

The mare shrunk slightly. “B-but I thought you wanted us to do that! That's why you showed us those paintings in class, right?”

The earth pony slapped a hoof to her face and sighed. “Those were examples, you were not supposed to copy them.”

“Oh.”

“Get out of my office.”

“Yes ma’am.”

Twilight gulped, turning back and trotting sadly into the hall, the heavy door slamming shut behind her as she was left alone with her thoughts.

With a cry of childish rage, she gripped the grade announcement sheet and whipped it against the floor before viciously stepping on it over and over until it was nearly unrecognizable. A pony walked by, giving her an odd glance before turning and muttering to her friend and laughing. The mare breathed hard, gulping for breath as she stared down at the floor.

When she finally managed to catch her breath she lifted her hoof and pulled the sheet out from under it, slowly unfolding it until it was straight once more. It wasn't perfect, it was hardly even legible but somehow, despite her rage, her grade was still perfectly readable.

With one last sigh, she turned and began the arduous journey towards her room in the castle, and after, Celestia’s study.

After a nice supper, a calming bath, and only one minor panic attack, the mare stood once more before that fateful set of double doors. She clutched the sheet tight against her breast before reaching her hoof up and knocking twice.

“Enter, my student,” Celestia replied, nearly instantly.

That's not a good sign. Twilight thought, before brushing aside her fears and walking inside.

Her room was brightly lit, the alicorn lay on a small mound of pillows with a second pile placed across from it, which was perfectly large enough for Twilight. The mare gulped, looking up at her patiently waiting mentor who extended a hoof towards the mound of pillows across from her.

“Come, sit.” She stated simply.

The mare gulped, hardly noticing the dull boom of the double doors closing behind her, instead she focused on simply putting one hoof in front of the others until she was exactly where Celestia wanted her to be. The mare fidgeted, pretending to move the pillows into a better position, but actually just trying to hide her grading sheet while not having to look the alicorn in the eye.

“How did your exams go?” She asked.

The mare nodded. “Good, very good.” She winced. “For the most part.”

“What was that last part?” Celestia inquired, her eyes narrowing slightly.

The mare gulped, slowly pulling out the sheet and extending the folded slip of paper towards the alicorn. “I didn't do so well, in… art.” The words were difficult to form, the admittance of failure at something so basic, a class so utterly beneath her was a difficult act.

Celestia’s face betrayed no emotion as she gripped the slip, opened it, and slowly read it, her eyes growing more narrow by the second. Finally, when she was done, the paper was incinerated, the ashes of which fell silently to the ground.

“I didn't mean to! I just thought that we were supposed to copy them. I know it's foolish in hindsight but…” Her head fell and the mare could feel tears coming.

The alicorn gently picked up the mare’s chin, forcing their eyes to meet. Where she had expected to see anger, there was only pity, and for some reason, that only made it worse. “Twilight Sparkle.” Celestia sighed. “I had never thought you would be very good at art, but I would never have expected this.”

She shook her head slowly, her ethereal mane shaking as if the invisible breeze the blew through it had suddenly picked up. “You will have to redo the course-” The mare could feel an invisible nail ram into her heart. “-with a tutor-” A second nail. “And until you've passed, you are not allowed to cum.” That was it, with one last nail she collapsed to the ground, tears coming to the edge of her eyes. “But.”

Twilight looked up at the alicorn, her enormous eyes glistening with moisture. Celestia couldn't help but wilt slightly under that intense level of cute. “You will go through the course at your own pace, and if you do well, which I’m sure you will, you may even be able to complete this course by the end of the month.”

Twilight breathed a small sigh of relief, an act stifled somewhat by the now familiar impish smile that crossed Celestia’s face, making the mare gulp.

“W-what else?” She asked pathetically.

“Oh, nothing. You will merely be warming my bed tonight.” The alicorn stated, quite a matter of factly.

Twilight shuddered at the alicorn’s words, unable to hold back the tidal wave of fear, and arousal that threatened to grip her. The young mare had warmed her mentor’s bed a few times and every time had opened up entire worlds of pleasure, leaving her weak in ways she had not thought possible all while leaving her more pent up than she thought equinely possible. Even though it would likely light a fire in her belly for a week or more, Twilight was forced to admit to herself that she looking forward to this moment.

The alicorn rose suddenly, her impish smile never leaving her face. “I have had a long day, I think we will retire early. What do you think?”

The mare gulped. “As you wish, my princess.”

The mare grunted, her eyes crossing for a moment as she lost focus on her brush, nearly dropping it. She managed to push the fresh wave of pleasure from her mind and refocused on her task, gently bringing her brush down and around, adding a gentle swirl to a soft, fluffy cloud. With that done she went to dip her brush in the water only to accidentally move into a position that allowed an even greater surge of pleasure to course through her.

“Hnnngh.” she grunted, standing stock still as her body locked up.

It had been weeks since she came and every day her heat and her humiliation rose and today was no different. She refocused her magic on the brush, feeling the soft caress of Celestia’s lips as they kissed up her spine and eventually rested on her neck where the alicorn gently bit down.

Twilight fumbled, her magical aura threatening to dissipate entirely under the alicorn’s onslaught. With a mental shove, she pushed those thoughts to the back of her mind and lifted her brush once more, adding a bit of blue to it as she went.

Behind her, the alicorn regripped the mare’s flanks in both hooves before thrusting up into her just in time to ruin her swipe and add a sweep of blue to one of the formerly pure white clouds. Twilight groaned at the sight, mentally planning what she would all have to do just to fix that small mistake.

Thankfully it wasn't too bad, she would just have to cut off one of the clouds and paint over part of it before adding more definition to the original cloud’s shape. Which sounded a lot simpler when you did not have a horny alicorn balls deep in your ass, who was also seemingly hell-bent on making this incredibly difficult.

Celestia giggled at the suddenly foul expression that crossed her student’s face. “Having trouble, Twilight?”

The mare shook her head. “No.”

“Good, because I think I’m almost ready to cum again.”

Twilight gripped the easel a little tighter, feeling the alicorn’s hips slap against her own at an increasingly alarming pace. “C-can I, c-c-um?” She whimpered.

The alicorn seemed to think about it, her thrusts slowing and the strap-on that had been brutally pounding her for nearly an hour finally slowing to a more reasonable pace. “No.”

The mare’s heart fell, but as it fell she couldn't help but feel a little aroused by being denied once again. She had spent so much time on the edge that it felt strangely good to remain there, perpetually seconds from cumming and still unable to reach it.

“Continue. I want to see what your painting looks like when you're done.” Celestia commanded, her thrusts increasing twofold as she raced back up to the orgasm that had slipped between her hooves.

The mare lifted her brush. “Yes, my princess.”

“And that is why you don't simply slap one color next to another. You need to think about it, plan it out, and understand what all the colors of the painting will be, you must think of that color as individually and as a collective whole.” The tutor nodded, adding another line to the blackboard, which Twilight tried to write down only for her eyes to roll back in her head for a second and a low moan to escape her lips.

“Oh, sweet Celestia.” The unicorn muttered, gripping the desk tightly as the toy buzzed even harder.

“Did you say something, Twilight?” The tutor asked, turning away from the blackboard for the first time in almost an hour.

The mare was tall, slender, and such an elegant grace about her that Twilight could understand why her parents had chosen the name Regal Brush. The pegasus sighed, noticing that her student seemed to be distracted again. “Twilight Sparkle, what was the last point I just made?”

Twilight gulped, feeling the vibrating toy increase its buzzing until she very nearly moaned in front of her tutor. “T-that you sh-sh-shouldn't think of a color not just as a p-p-part of the picture but as a wh-whole.” She stuttered the other toy that had filled her cunt beginning to piston in and out of her hole just as she was about to speak.

The teacher blinked and nodded slowly. “Yes, that is correct.” She looked like she wanted to say something else, only to slam her mouth shut as she looked back at the blackboard.

With her attention gone, Twilight had hoped the toys would slow down a little but Celestia seemed to be enjoying herself and they only increased in speed. The toy pistoning out of her hole became a blur as it slammed itself in and out of the teenager’s pussy at such a pace that if it wasn't equipped with a sound dampener it would have drowned out the tutor’s lesson entirely. It didn't help that it had started going so deep that it brushed against the other toy, which had grown to buzz at such a rate that the mare could feel her legs begin to vibrate.

The toys on their own weren't so bad but it was the fact that the magic dildo seemed to grow a little thicker and lengthen slightly with each thrust that really made it unbearable. Couple that with the fact that the vibrating bead was being pushed deeper and deeper and you can begin to understand why Twilight had her desk in a death grip.

She could almost feel another orgasm coming on only for it to dissipate, blown away by the spell placed upon her. She probably would have came nearly a dozen times but without Celestia’s approval all Twilight could do was sit, wait, and hope that Celestia either grew bored with her or allowed her some much-needed relief.

Celestia was anything but merciful in this regard and as she sat on her throne, overlooking a small group of nobles that seemed to be distracted by an argument, she glanced to her left where a screen displayed her student. It was invisible to all but her eyes, and just close enough to the two whiny nobles that nopony noticed her looking away. Which allowed her to subtly light her horn, disguise the spell as an attempt to grab water, and turn up the toys she had placed in Twilight.

The effect was immediate and Celestia smirked as Twilight’s already tight grip on her desk increased to the point that Celestia could tell she was having a hard time seeing straight. The smile on Celestia’s face grew and grew and only when she remembered where she was did she wipe it away.

Soon my faithful student, soon. The alicorn thought to herself, watching as Twilight desperately tried to reign in her ragged breathing, lest her tutor catch her in the act.

The alicorn sat back on her throne, paying only partial attention to the nobles speaking at her and instead staring at her student with hunger in her eyes.

“Celestia, mmf, p-please let me cum!” The mare begged, her hips lifting and slamming back down against Celestia’s over and over.

The alicorn lay on her back, one forehoof tracing down Twilight’s sweat-stained face while the other held the remote to several beads that were stuffed inside Twilight’s already well-packed pussy. Celestia smirked, watching as Twilight continued to carry out her orders even while the unicorn’s entire body seemed ready to rebel. The mare’s limbs shook, her face contorted into a twisted mockery of pleasure and her ragged breathing only grew worse as time passed.

She tapped her chin thoughtfully while she watched, enjoying the sight of Twilight’s body shaking as the mare rode her. “Hmmm, maybe.”

The unicorn whimpered pathetically, gripping the sheets tight in her hooves. “P-p-please!”

“I’ll think about it. If you manage to make me cum in the next thirty seconds.” Celestia replied simply.

The unicorn’s eyes lit up, and Celestia delighted at seeing that flicker of hope kindle inside her student. With renewed passion the unicorn lifted her diminutive hips and slammed them back down, pushing the alicorn’s magic cock deeper than she had ever done before. The maneuver unfortunately pushed the beads deeper than ever before but Twilight didn't care, she had a chance, slim though it might be, that she would finally be able to cum. It had been weeks but finally, she had passed the test and been told to warm Celestia’s bed once more, leading her to this very moment where she finally had the chance to get the relief she craved.

Surely the alicorn would finally let her, right? She did say she would after all…

Twilight pushed it out of her mind and got back to her duty, i.e. serving as Celestia’s personal sex slave.

With each time their hips connected, Twilight paused to grind the alicorn’s magic cock before lifting her hips up and repeating it over and over again. The mare knew well just how much Celestia seemed to enjoy this and the small way Celestia’s jaw tightened was all the clue she needed. She also knew she needed more, or else the alicorn wouldn't cum in the allotted time.

So the mare unleashed her next arsenal in her armory to get Celestia off. “Oh stars above, you’re so big.” She muttered, her words morphing into a moan of pleasure.

The effect was immediate and Twilight could feel the alicorn tense beneath her. She knew Celestia loved dirty talk and Twilight had only gotten better at it since she had started expanding her literary horizons into more adult territory. “I can't wait to feel your hot cum inside me.” She whispered, slowing her thrusts enough so she could whisper in the alicorn’s ear.

Celestia smirked, despite her throbbing arousal. Her student was learning and had evidently taken note of Celestia’s likes and dislikes and was now pulling out all the stops.

The mare twisted, writhing on the alicorn’s enormous magical endowment, her moans filling the air as she ran a hoof down the matted fur on her chest. The sensual display was not something she had ever done before and Celestia silently gawked at the sight of her student moaning and writhing in pleasure like a cheap whore.

She could already feel her orgasm begin to build but Twilight had nearly another ten seconds left, so rather than give Twilight the easy win Celestia held back, not hinting at all as to just how close she was to coming. Twilight herself spared a glance down at Celestia, one eye cracking open slightly as to ascertain just how close the alicorn was. To her shock, the alicorn actually yawned, seemingly not enjoying her ministrations at all.

The mare grit her teeth and grabbed the bed, readying her secret weapon.

With a resounding thump, she threw back her hips, making their bodies connect with incredible force, and before Celestia could hope to ignore the renewed waves of pleasure, Twilight had already done it a second, and a third time. The feeling of such rough, nearly violent riding was not new to the alicorn but it was another trick Twilight had never tried before now and it caught her off guard.

Rather than fight it she merely laid back, accepting her defeat at the hooves of her most expert student.

Twilight had nearly lost all feeling in her back legs by the time she felt her mentor’s stomach muscles twitch, signaling that she had won, and with only a few seconds left. The feeling of relief was immense but she knew better than to give up now, Celestia was a strange pony and if Twilight stopped now then there was a chance that Celestia’s orgasm would just die before it came. That had been a hard lesson, but not one she would ever forget.

With determination surging in her heart, she continued to slam herself on Celestia’s cock over and over and over until she finally felt the alicorn empty her balls and fill Twilight’s pussy with her magical seed. It wasn't true seman of course, so she didn't have to worry about pregnancy but the feeling of having her pussy filled with the alicorn’s cum was unbelievably good and with that thought firmly in mind she looked down, and asked the one question that she had thought about daily for almost a month.

“Can I cum?” The mare asked.

The alicorn smirked. “No.”

Despite being shut down once more, Twilight couldn't even be angry. Something strange and oddly dark had been awakened in her over this last month and she couldn't help but feel oddly turned on by the knowledge that she would spend who knows how long without being allowed to cum.

She just hoped it wouldn't be too long, or else she might have to start wearing clothes just to hide her arousal, something Celestia was sure to not allow.