Twilight Sparkle Gets Sent to the Principal's Office

by thatoneguy28

Rating: mature
Tags: Sex, Twilight Sparkle, Princess Celestia, Slice of Life, My Little Pony: Friendship is Magic
Length: 3804

Twilight has failed her mentor one too many times. Now she's been called to Celestia's room, but for what?

Twilight Sparkle. Celestia's prized student. Savior of Equestria. Perpetual failure? After event after event where Twilight, while managing to make things right in the end, manages to screw things up in the first place, Celestia always has to step in to fix things. And every time she does, she forgives Twilight. Because a good teacher allows her students to make mistakes, right? But eventually, even the most patient of ponies reaches their limit, so she calls Twilight to her bedchamber to discuss things.

Based off a nice picture drawn by PonyThroat, whcih can be found on derpibooru using number 1381821

Warnings: unbirth, various bad-ish ends for the different story endings I wrote.

Published 2017-03-24 17:30:01 UTC
Last updated 2017-03-24 17:30:01 UTC

The Story

Twilight stood rigidly still inside of Celestia’s bedroom. Her mind raced as she tried to piece together why exactly she had been invited to this particular bedroom. From what she knew, only a select few were ever called to Celestia’s quarters: her Royal Guards, her Sister, ponies she wished to consort with, visiting dignitaries, visiting dignitaries with whom she wished to consort with, and those she deemed worthy. As far as she could figure, Twilight was none of those. Not after mistake after mistake after mistake she had made. But certainly a pony such as Celestia would be forgiving of her best and most favored student. At least, that’s what Twilight had told herself time and again whenever she was graced with Celestia’s forgiveness.

“Surely she doesn’t want to consort with me,” she said aloud. A light blush graced her face as she imagined Celestia walking in and propositioning her. She shook her head to rid herself of the thought. “No, no, of course not! That would violate the very nature of our student teacher relationship!”

After what seemed like an eternity to the over-analyzing and panicking rampant in Twilight she finally heard the telltale sounds of hoofsteps walking down the hall. She managed to make out some words coming from the other side of the door (obviously to the guards) saying something about being relieved and to not disturb anypony in the room for the next few hours. Two sets of hoofsteps sounded from behind the door before they slowly faded away.

Suddenly there was a loud bang as the door to the room was flung open. Twilight jumped nearly 10 feet in the air, landing on her hooves and freezing in place when she heard,

“TWILIGHT SPARKLE!”

She blanched, ears drooping down. It was VERY obvious to her that it was definitely not wanting a consort. In fact, the only time she had heard that particular tone was… was…

“Oh horseapples…”

As soon as Princess Celestia was in visual range of Twilight, she launched into a fast paced, well rehearsed apology for whatever it was she had messed up yet again. Not three words in she was cut off by Celestia.

Celestia stared hard at Twilight, as if she was thinking of the best way to voice what needed to be said. An uneasy tension hung in the air as neither pony spoke, the silence deafening. Finally with a sigh Celestia broke the silence.

“Twilight… You know that you’re my favorite student, right? And that a part of learning is making mistakes and learning from them? But eventually a pony shouldn’t be still making similar mistakes in regards to their duties, correct?”

Twilight could only nod in her silence. She hated being scolded, especially from somepony she regarded as her ultimate mentor.

“The parasprites I forgave because obviously you didn’t know anything about them. The Discord incident was unfortunate but again I forgave you because it wasn’t your fault for the situation to begin with. And of course, casting the unfinished Starswirl spell and switching the cutie marks of your friends would have ended up with a strike, but you managed to not only to fix the spell but also ascend to alicorn status.”

She paused and shook her head as she remembered the incidents. “However! The Want it, Need It spell was your first strike, because I had to step in to fix it. Your second strike came with your fight with Tirek. You were supposed to take the magic and hide, not attempt to fight Tirek, regardless of your home being destroyed or not. And third: Your meddling with time magic. I was well aware of the time spell you used to go back in time two weeks as well as the multiple timelines you ended up creating while chasing Starlight Glimmer through time using the Starswirl Time Spell. Yes you managed to de-escalate the situation, but were you aware of how much damage to the original timeline you created? And how much magic I had to expend to limit how bad the ripple effect was?”

“I-”

Celestia held up a hoof to cut Twilight off again. “I’m sorry Twilight, but I’m afraid I can no longer put up with all of your mistakes. Regardless of your status you are still my student and as such subject to punishments up to and including expulsion.”

As she spoke, Celestia turned around and flagged up her tail to show off her mare bits. Twilight could only blush and stammer at the view even as it looked to get closer. She could smell Celestia’s scent get stronger until the winking slit squished against her muzzle. She finally blinked and snapped out of her initial shock.

“P-Princess! What are you doing?!”

Before she could get a reply, Twilight found her muzzle slipping between the soft lips of her mentor’s pussy. A scent of arousal she had never noticed before assaulted her nostrils as she slipped inside surprisingly easy. To a pony as large as Celestia, Twilight really was a little pony. Celestia slowly squatted down onto Twilight, forcing more of her body inside. The velvety texture of the accommodating passage rubbed and massaged against Twilight as if she were an actual cock shoved inside Celestia, which only helped pull the smaller Twilight inside.

Twilight was caught off guard for the whole situation, not registering any sort of arousal until her wings had slipped inside of Celestia’s passage. Her wings tried to flare out but only managed to make herself wedge tighter inside and bring more pleasure to the larger mare. She felt the passage spasm around her and could feel Celestia’s clit winking against her underbelly as she slipped even further in. The odd pleasure from that brought Twilight out of her shock just as her head bumped against Celestia’s cervix. With a slightly more level head Twilight remembered her horn and attempted to teleport out. Her horn lit up, she felt the magic start to channel and then… it just disappeared. The spell never went off, but it felt as if she had expended the magical energies like it had. Just after, the walls around her clenched hard around her and massaged her with more vigor, pushing her harder against the cervix. The juices around her increased in volume and increased again when she attempted another spell. Though muffled, Twilight could just make out a very pleased sounding moan from Celestia. The passage shoved her even tighter against the cervix before she was forced inside the womb to curl up, bulge forming in Celestia’s belly. Celestia used her magic to rub on the bulge, a small smile forming on her face.

“Now then… what to do with you?”

ENDING 1: Sent Back to Magic Kindergarten

Once inside the womb, Twilight found herself tight, cramped, and with very little room to move. Her mind worked fast to piece together what she thought was the truth: this was a test to prove herself. She first attempted to push her way back outside of the womb but found it was too tight for her to force her way out. Her second attempt was to kick and squirm about to try and bring discomfort to Celestia, but she quickly realized it was just a waste of her energy. Finally she tried her third attempt. She lit up her horn to try and teleport out. Unfortunately, she felt the same magic drain she had earlier while wedged in Celestia’s tight pussy with no apparent effect. She wasn’t outside the womb, the spell hadn’t cast as far as she could tell, but the magic had been drained. When she felt something inside the womb along with her, she lit up her horn for a weak illumination spell, happy to see that working at least.

What she wasn’t happy to see was what was shown with her light: some kind of tube sliding along her belly. She let out a sharp yipe when it felt like it had bit onto her, the sharp, though brief, pain causing her to thrash about.

“Now now, Twilight, please calm down. You are safe, you won’t be harmed beyond the small sting on my umbilical cord attaching to you.”

Twilight, in her panic, attempted a second teleportation spell, this time feeling the magic drained away from her and out, not by her horn but through the cord attached to her. She felt a hoof rubbing against the bulge she made and just barely made out the words of Celestia.

“There’s no need to panic. Casting spells, however, will only serve to speed the process further.”

Twilight was confused about what Celestia meant by process. She tried to concentrate and cast a more powerful teleportation spell but she felt the same drain in magic but with no results. She also found a strange sensation. Despite expending her magic, she still felt like she had a full charge of mana. And she also came to the realization that the womb she was in seemed less cramped. Calming herself she finally lay still and steadied herself, listening and waiting. Now she could detect in herself a magical leak. Her magic wasn’t being focused on her horn but at her belly. Right where the umbilical cord was attached. Twilight also found her surroundings not quite as tight as before. Was she shrinking?

“P-Princess!? What’s happening to me? Is this a test?” Twilight asked hastily, bring a hoof up to her mouth at the sound she made. It was the same pitch now as when… as when she was… “I’m getting younger? But how? Why?”

“I have decided that I will give you a do over. Since you’ve made so many mistakes in the past and haven’t seemed to learn from them, instead of expelling you from my mentorship I’ll simply regress you back to a foal and send you back to Magic Kindergarten. Most of your knowledge will disappear in the process, but I’m making sure that the failures you have committed and the reason for you going back remain intact so this doesn’t happen again.”

Twilight had many questions. How was Celestia doing this? Was it going to hurt? Was this going to mean that Celestia was her mother now? And what of her friends? Her… friends? As Twilight continued to get younger and younger in Celestia’s womb, knowledge of the friends she had made faded away. A pinkish purple unicorn, a blue unicorn that she thought might have been a rival, faces without names. And even those faces faded away. She was soon left with just memories of her closest friends and her family.

Minute details on what her and her friends had done as the Elements of Harmony disappeared. All that remained was a vague sense of the events that happened and how she had screwed them up. She grew smaller, younger, her mind losing more memories. One by one she forgot about her closest friends, a pink one, a yellow one, a white one, a blue one, an orange one, another pink… no, that was the same pink one. More faces without names and eventually, not even faces. Then even her family memories. She had a mother and a father and a brother, but their names escaped her. By then she was nearing less than three years old. The years drained from her until finally, everypony she had known, the spells she had learned, all of her memories save for her mistakes, gone. Finally, the regression stopped, leaving Twilight at about half of Celestia’s gestation period. It would take a few months and careful mental manipulation as Twilight grew, but she would someday be ready to be born to attempt her learning yet again.

Celestia moved a hoof to rub at her still obviously pregnant but not quite as round belly and cooed softly. “My little pony, I hope you will not make the same mistakes growing up as you did the first time.” She paused and continued to rub on her belly. “That is, if I decide to keep you to term.”

ENDING 2: Expelled

Once inside the womb, Twilight found herself tight, cramped, and with very little room to move. Her mind worked fast to piece together what she thought was the truth: this was a test to prove herself. She first attempted to push her way back outside of the womb but found it was too tight for her to force her way out. Her second attempt was to kick and squirm about to try and bring discomfort to Celestia, but she quickly realized it was just a waste of her energy. Finally she tried her third attempt. She lit up her horn to try and teleport out. Unfortunately, she felt the same magic drain she had earlier while wedged in Celestia’s tight pussy with no apparent effect.

“I’m afraid that all spells you attempt to cast get redirected into me. An easy and effective way to recharge my own magic without needing rest. But that’s really not something to concern yourself with right now. Doesn’t it feel warmer inside me than it should?” Celestia asked, hoof trailing on her squirming belly.

Twilight froze and finally realized that it was much warmer than a pony womb should be. But her mind tried to rationalize it by comparing the increased temperature to the fact that Celestia was tied to the sun. A reasonable assumption but it seemed to be getting hotter by the second. She was sweating profusely. She lit her horn for an illumination spell and wiped her brow. It was so hot she could swear she was melting. She glanced at her hoof and gasped. The sweat on her body wasn’t clear like sweat, but more purple in color. As it dripped off, it began to pool around her trapped body. She began to push and fight again but found her hooves and legs bending in ways they shouldn’t. She had no purchase and no rigidity to push any more.

“H-how? I’m… I’m melting?”

“Painless, right? Just a few hours inside and you’ll get fully melted. Well, it’s not exactly melting, I’ve cast a spell on my womb. Anything inside is slowly transformed from solid into liquid. But in this case the liquid is my own mare juices. And do you know what I’m going to do once you’re transformed?”

Twilight shook her head as she felt more of herself painlessly drip into the rising puddle around her.

“I… no? Why? What are you doing? Is this some kind of test?” asked Twilight in what sounded like hurried desperation. “Please, let me out! I’m getting smaller as time passes and the stuff I’m turning into is rising higher!

Celestia only shook her head in response. “Twilight, this is no test. This is your punishment for failing so many times. I’ve decided that, once you’ve finished your detention in my womb, you are to be expelled!”

Twilight drooped her ears and a horrified expression crossed her face. “Ex-Expelled? But, if I’m expelled, I’ll never get into any other magic school! Who’ll take a unicorn that was expelled from Celestia’s School for Gifted Unicorns?”

Celestia gave a slight chuckle. “As always, the faithful student makes a grave error. Getting into another school will not be a concern of yours. I literally mean expelled. As in, you’re going to be my release after clopping.”

It felt as if the heat was turned up yet again, the illumination spell fading out when her horn dripped off into the rising puddle. She could still move, albeit her movements became limited. Twilight continued to grow ever smaller, her sharp defined outline now looking more smooth and round. She attempted to speak, but by that point, any sound she made was a gurgling sound.

While Twilight’s transformation was going on, Celestia had made her way to the bed. She flopped upon it and landed on her back while simultaneously spreading her back legs. She lit up her horn and began playing with her nether lips. It had been some time since she had expelled a student from her school, but it was by no means any less fun. She rubbed a hoof over her now rounded belly, looking more like a pregnant mare and not one with a whole pony princess shoved inside her womb.

“It seems that your transformation is complete,” she cooed as she began targeting her magic directly onto her clit. “I’d take my time with you, but I’m afraid my own princess duties require speed and due diligence.” Celestia let out a loud cry of pleasure as her juices slowly dripped from her pussy. She cursed under her breath as she began to buck and writhe on the bed. Her clit was hypersensitive: a curse at some times, a blessing at others. This time it was a blessing, the large alicorn mare panting hard as sweat formed on her body. She tugged and pulled at her clit, feeling the inevitable pressure building. Just on the edge, she managed to speak through her loud moans.

“T-Twilight Spark…. Ungh! Despite being my mmmmm…. Most faithful student… Your failures and dis AAah~ pointments can not be overlooked. As such, as your mentor and… ooooooh… y-your principal, I revoke your title as Princesssssss…. And hereby expel you f-from my…. My…”

Her words devolved into one loud cry of pleasure as her back legs began to spasm. Her slit winked a number of times before a rush of fem juices spurted out. In the midst of her pleasure high, Celestia used her magic to direct the flow of her juices, tinged purple thanks to the melted mare, so that the puddle formed in the shape of Twilight’s cutie mark. Celestia panted hard from the exertion of her release, glancing at the purple puddle on the floor. She took a few minutes to recover before she stood up from the bed. She made herself up to look proper before turning to head out to the main hall. She took a glance back at the puddle and grinned.

“Perhaps I’ll have somepony come mop you up. Perhaps I’ll just let you dry there. Either way, enjoy your new life after expulsion,” she said simply before walking out into the hall and slamming the door shut.

ENDING 3: Splitting the Difference

Once inside the womb, Twilight found herself tight, cramped, and with very little room to move. Her mind worked fast to piece together what she thought was the truth: this was a test to prove herself. She first attempted to push her way back outside of the womb but found it was too tight for her to force her way out. Her second attempt was to kick and squirm about to try and bring discomfort to Celestia, but she quickly realized it was just a waste of her energy. Finally she tried her third attempt. She lit up her horn to try and teleport out. Unfortunately, she felt the same magic drain she had earlier while wedged in Celestia’s tight pussy with no apparent effect. She wasn’t outside the womb, the spell hadn’t cast as far as she could tell, but the magic had been drained. When she felt something inside the womb along with her, she lit up her horn for a weak illumination spell, happy to see that working at least.

What she wasn’t happy to see was what was shown with her light: some kind of tube sliding along her belly. She let out a sharp yipe when it felt like it had bit onto her, the sharp, though brief, pain causing her to thrash about.

Twilight, in her panic when the umbilical cord attached to her with that sharp sting, attempted a second teleportation spell, this time feeling the magic drained away from her and out, not by her horn but through the cord attached to her. She felt a hoof rubbing against the bulge she made and just barely made out the words of Celestia.

“Casting spells will only serve to speed the process further.”

Twilight was confused about what Celestia meant by process. She tried to concentrate and cast a more powerful teleportation spell but she felt the same drain in magic but with no results. She also found a strange sensation. Despite expending her magic, she still felt like she had a full charge of mana. And she also came to the realization that the womb she was in seemed less cramped. Calming herself she finally lay still and steadied herself, listening and waiting. Now she could detect in herself a magical leak. Her magic wasn’t being focused on her horn but at her belly. Right where the umbilical cord was attached. Twilight also found her surroundings not quite as tight as before. Was she shrinking?

“P-Princess!? What’s happening to me? Is this a test?” Twilight asked hastily, bring a hoof up to her mouth at the sound she made. It was the same pitch now as when… as when she was… “I’m getting younger? But how? Why?”

“If I forgave you for your mistake once again, you’ll only go forward continuing to make the same mistakes. Even if I were to send you back to Magic Kindergarten, I’m afraid nothing could be done to guarantee the same mistakes not being made again.”

As Celestia spoke, Twilight found herself getting younger, as years were taken from her in a matter of seconds..

“My explanation to you really means nothing, though. There’s nothing you can do to stop me. Your memories I’m leaving alone but it will eventually not matter,” she said, rubbing a hoof on her belly. She estimated Twilight to have lost a good deal of age by that point, perhaps around 10 to 15 years. “Every friendship you’ve made, everypony that knows you is forgetting about you.” Celestia paused to glance at her shrinking belly, feeling the magic drained away from Twilight.

“Oh don’t worry,” she continued, no longer expecting a response from a pony too young to even speak now. “I will still remember you, at least for some time. How you failed me and what I was forced to do.” Her belly looked flat but she could still feel the magic being drained. Embryo became a mass of cells, cells became a single cell, an egg impregnated by a sperm. As her magic began to wind down the fertilized egg split one last time. Inside her womb was a single sperm and an egg. She used her magic to keep the sperm away from the egg long enough until it expended all of its’ energy and went still.

“I’ll eventually forget about you just like everypony else, but for now I’ll use your failures to improve my teaching for my next faithful student.