Twilight's Workout

by Nightprincessluna

Rating: mature
Tags: Porn, My Little Pony: Friendship is Magic, Fetish, Royal Guard, Sex, Twilight Sparkle, Profanity
Length: 4390

Princess Twilight is getting a bit plump now she has become an alicorn and taken over from Celestia, so with the aid of a guard, she begins her exercises for the day.

Fearing she is getting a bit too plump for her own good, alicorn Twilight begins her workout for the day with the aid of a guard. A work out that includes her growing to an immense size and sitting upon the poor guard, drenching him in her sweat, and then swirling him around in her mouth.

(Contains yoga pants, sweat, size growth, giant maw play, oral sex, and light breath play)
(This story wasn't a commission)

Published 2022-07-26 18:30:00 UTC
Last updated 2022-07-26 18:30:00 UTC

Chapter 1

Time, such a strange thing to witness. It ground rocks and mountains to dust, it buried even the greatest of ponies, and it also healed almost all wounds and was the greatest teacher of them all.

Princess Twilight Sparkle had been a pupil to someone she believed to be the best teacher in the world at the time, the ruler at the time known as Celestia. Celestia, with the aid of her younger sister, had bought about centuries of peace to her subjects and then passed on the task of ruling to Twilight.

Twilight had learned a lot from the tall ivory mare. But even the best teacher in the world wouldn't be able to teach her as much as three hundred years of ruling had.

For one, Twilight liked food. She liked good food, sweets and cakes, treats from all around the world were bought before her to be consumed. Secondly, eating all those treats and sweets wasn't very good for you, even if you were effectively immortal.

The large purple alicorn didn't want to admit it, but she had put on quite a lot of weight over the years. She stood at twice the height of a normal pony, and her rear was a jiggling mound of fat that posed a health hazed to those around her if she turned around too quickly.

But, once again, time was there to save her, and with a rigorous exercise timetable, she was slowly working on getting less padding and more muscle.

Her dark purple eyes fixed on one of the guards outside her throne room. He was a white furred stallion with a blue mane, wearing a suit of polished brass armour that looked too old to be of any effect in a fight. He was an honour guard, he had dedicated his whole life to the task of being a glorified decoration and amusement for the castle visitors.

And yet he was still loyal to a fault. "Guardsman, does my rear look fat in this?" She asked, suddenly swinging her rear around and bending down before him. It was an act that would have normally looked submissive, practically begging to be mounted by him.

When Twilight did it however, her massive rear, which was currently constrained by a pair of crushingly tight black yoga pants covering her hind legs and those immense mounds of fat and flesh, it didn't look submissive in the slightest.

Her immense rear jiggled and flopped about above him, blocking out the light coming from overhead and casting a shadow over his face.

His expression didn't even shake once.
"No your highness, I do not believe those yoga pants make you look fat."
The stallion's sky blue eyes kept staring ahead at the wall he was guarding, protecting the hallway and not seeming phased in the slightest.

Twilight didn't show that she was impressed, he was one of the first guards in memory that hadn't shown the slightest reaction to this.
"Really? Because I'm getting rather concerned about my weight, I mean my rear is doing this and I don't think it's normal."

With that she begin to shake her rear from side to side, before bucking her hips up and down in a dance the youth's called twerking. Those immense mounds of purple furred flesh jiggled about in the yoga pants, before she got the dance just right to cause the two sides of her ass to impact each other, sending a loud clap echoing around the hallway.

With the movements down, it was easy to make them clap again. CLAP CLAP CLAP CLAP, the sound filled the hallway as her gigantic rear smacked against itself again and and again, sounding almost like a thunderstorm as the shadow cast over the stallion twisted, wobbled and warped in time with her flesh.

That massive black stretch fabric coated rear looked like it was threatening to swallow up the sun from the stallion's prospective, a wobbling, swaying monument to gluttony and 'thiccness' that would have had most stallion's jaws on the floor.

The stallion didn't even flinch.
"Your highness, I am a guardsmen. I cannot comment on any medical concerns you have, besides saying that you should speak to a medical professional about them."

This pony was a stallion of sheer fucking willpower and commitment. Anyone else would have been reduced to a mewling mess just from the first action alone, she was basically their God, a living God that was shaking her ass right in his face, and yet he didn’t seem to give a damn in the slightest about any of that, so focused on his duty that it had acceded him beyond mortal limits.

She was stunned, she was amazed, and she was glad that now she had something interesting to study. Twilight loved to study, but by this point she had read most the books in the library several times over, and so her only source of amusement was pulling pranks on the guards.

Straightening herself and towering above him, her purple eyes gazed down over his form. The enchanted armour made all guardsmen look the same, although this guard was wearing the royal armour, made of brass rather then just being coated with gold paint. It seemed that he had actually dyed his mane blue and his fur white to match with the rest of the guards, something only the most committed did!

“What is your name guardspony?”

The pony didn’t skip a beat, as was expected at this point.

“My name is Sentinel Farsight your Highness, fourth in the farsightline!”

His voice betrayed the first emotion besides commitment to his duty, there was the tiniest hint of pride at those words.

“Would you like the honour of being my personal bodyguard for the day while I go and complete my workout routine, Farsight?”

Farsight gave a stiff nod, “It would be an honour your Highness, let me get one of the other guards to take my station!”

Even though he didn’t seem bothered by any of the booty shaking or attempts at crude seduction that she had carried out, he was still committed to her cause one hundred percent of the way, and no guard could turn down a request from their Queen like that.

After finding a replacement guard to make sure nobody broke into the throne room, the two of them headed off to the Castle gym.

Unlike the rest of the castle, the gym wasn’t a fancy affair tied down by tons of bureaucracy and bickering between the architect, Clark of works and the interior designer, no, Twilight had made certain to snatch the designs for her bedroom, the library and the gym from their hooves before they got chance to argue over it for the better part of a year.

A treadmill, a weight rack, some exercise balls, and a machine that she never really worked out the function of. She didn’t have a weight bench or any of those other things purely for the purpose of putting on muscle, she was a mare and had no interest in becoming a wall of muscle when she had a perfectly good horn that could do all the heavy lifting for her.

The treadmill was the first machine to get usage.

“Stand at the back of the treadmill and spot me guardsman Farsight, I’m going to go for a run and if I fall off I need someone to catch me.”

With that, the huge purple mare set her hooves onto the specially designed treadmill and put it on the first setting. Her hooves begin to move across the hard wearing rubber, each step making her rear jiggle softly behind her, right at the guardsman who still didn’t show any reaction.

The second speed got her heart moving, and then the third got her lungs working, that jiggling mound of flesh barely contained by tight strips of black fabric suddenly finding even more things to contend with as her fur begin to be covered by a slick layer of glistening sweat that poured out of her pores.

She was by no means an unfit mare, she had made sure that she kept herself in somewhat decent shape at the minimum, but whenever she got exercising, she always found herself sweating like a pig, an expression she had never really understood as pigs had a very small number of sweat glands and had to roll in mud to keep cool.

The muscles in her legs flexed, her lungs worked to keep pulling oxygen into them, and sweat poured off her like someone was constantly attempting to baste her. Those tight yoga pants got soaked, hugging tighter around her flank and looking like they were about to burst.

Each step caused wobbling vibrations to roll up her flank and along her sides, before dissipating close to her shoulders, she was never very good at being light on her feet, and the treadmill beneath her was starting to get wet from her sweat.

She had taken the curiosity of wearing a sweat band, but that was now getting drenched as well.

“Guard- Guardspony.. Towel me down would you!”

The guardsmen went off to get a towel, leaving Twilight to think on the fact that her producing so much sweat might have been because of her size. It was a thought she had entertained before, but now she was thinking of the perfect way to test her theory.

Slowing down the treadmill while the guardspony was distracted with fetching her towel, her horn glowed to life as she worked a simple spell over her form.

Well, it was simple for her. Her muscles were screaming, deep purple fur along her equine form plastered down to her body. Normally her mane would have been flowing dramatically behind her, but it was plastered down to her neck in a rather sad display.

She didn’t have time to use magic making her mane look fancy, she spent enough time straightening and dying the highlighted mass of mane, stretching to the middle of her back with a light purple and pink stripe down the middle of it.

Was she getting whoozy? She stared at the timer on the treadmill as the guard finally returned with a towel and begin trying to dry her off while her exercise carried on.

She wanted to beat her record. She had to keep going for another minute, but her body was definitely feeling strange. Her hooves kept hammering against the rubber flooring, but her body begin to swell and grow outwards, the spell she had cast finally starting to work.

She was growing outwards, starting with her hooves starting to thicken, followed by her body, neck and head, all growing outwards as the guard stepped back behind her in shock, not quite sure what was happening or how to respond as his training manual had not prepared him for this situation or anything even close to approaching it.

Bigger and bigger, going from twice the height of the guardsman upwards. Those tight yoga pants stretching taunter and taunter around her flabby mounds of fabulous fat, doing admirably at holding, really showing what a miracle of modern engineering they were, before at last a rip formed right down the seam.

With that, they gave all at once, flying off her with a loud TWANG, the sweat soaked rags posing about the same threat as a line mooring a ship giving would have to anyone standing in the way when it gave.

The poor guard behind her was directly in the firing line, and while he might not have seemed phased in the slightest by any of her antics, watching her massive rear pillows spill free from out of the tight constraints of her yoga pants did slow him down by less then a second.

Unfortunately, less then a second was a long time when it came to yoga pants being launched somewhere close to Mach 1. They smacked him square in the face, drenching it in sweat and stretching out his snout and muzzle for the briefest of moments that caused a highly amusing imprint of his shocked expression through the black fabric before he stumbled backwards and did his best to pry them from his face and toss them aside.

Her body didn’t stop growing until it was four times the height of the guardpony, the mare now a towering monument of sweaty yoga pants destroying flesh.

The treadmill was struggling to keep moving beneath her, and not wanting to risk mangling it beyond repair, she climbed down from the treadmill and turned towards the guard pony, who had used one of the towels to clean the sweat from his eyes.

At this point her pungent, but not too unpleasant musky scent had filled the room. For some reason Twilight could never explain, her sweat and body odour always ended up making everything smell like freshly cooked cheese nachos.

Over the guard, her horn glowed brightly to life as she plucked him from the ground like he was nothing more then a toy. The tiny guard found himself pinned against her sweaty flank as she used him like a towel, moaning softly herself as she stuffed his poor body against her sweat soaked form.

His armour was perfect for use as a flank scratcher, and his fur was soft, perfect for soaking up all the sweat that was pouring off her. With a soft sigh, the gigantic mare slowly dropped her colossal flank down atop him, crushing him beneath her immense weight. He pressed up against her flank desperately and begin to softly struggle, trying his best to break free, but also not struggling nearly enough to pose the slightest risk of harming her.

Such a loyal guard. His entire world was consumed by a huge mound of sweaty flesh and fur. His lungs burned, his nose desperately tried to draw in air, but only managed to draw in even more of her potent musk. Twilight felt him squirm, and then begin to desperately writhe as his lungs were left completely empty, and it was at this point that Twilight finally had the mercy to let him breathe, rising up and staring down at the sweat soaked stallion beneath her.

His face was flushed red from the heat, and his hooves squirmed softly as he finally got the chance to draw in air, but Twilight simply let out a soft chuckle. “How would my little guard feel about eating me out?” After she uttered those words, she suddenly felt her heart stop.

“I am terribly sorry I didn’t ask this earlier, but if you don’t want to give consent to these sort of games, then you don’t have to. I need you to acknowledge that you give consent, not just because I am your Princess and am in a position of power over you, but because it is something you genuinely want. If you decide that you don’t want it, then it won’t be held against you in any capacity at all.”

She lowered herself down to the height of the guard and softened her expression, driving her rampant lust away. “I should’ve asked sooner, but I lost myself there for a moment.”

The guard gave a nod, coughing lightly to clear his head before staring up at her, his mane plastered down with her sweat. “Well, I give my consent, one hundred percent!”

“Excellent!” Twilight beamed, before diving up into the air. The guard, who up to this point had been as emotionally dead as a fast food worker eight hours into their shift, stared up at the giant purple rear of his princess as it rose into the air like some kind of celestial body, blocking out the light.

And for just a moment, all that flashed through the guards mind was a quote from a movie he liked a lot: “Our ass will block out the sun.”

“Then we will fight in the shade.”

His eyes widened as that gigantic rear closed down upon him, unable to move or unroot himself from the-

THUMP

Pillowy flesh hit him like a wall, he was knocked down to the ground, he felt his armour save his ribs from cracking, but for a moment the force he was thrown to the ground caused his brain to freeze up and then black out. He thought that giant rear had crushed him like a bug beneath her.

It wouldn’t have been a heroic way to go, like how he had expected, peppered with arrows and making a heroic last stand in the name of his princess, but then again it wouldn’t exactly be a bad way to find his life ending either. He awoke to her snatch pressing all around his snout, her giant love tunnel more then enough to swallow up his snout and drown his senses in her potent musk.

He could barely breath, rapidly drawing in gasping breaths as he got his bearings about him. Twilight could crush him with ease if she wanted, even in her normal form she could wipe him from existence with a single bolt from her horn.

“You better get licking guard, I’m not letting you up until I cum!” She decreed.

The guard knew without a doubt that she meant it. His tongue wormed up into her snatch, working around her sweaty insides desperately. His nose was stuffed with her potent scent, and the fact that his nose was forcefully buried in her snatch wasn’t helping much either.

Focusing on her clit was by far the easiest way to make her cum, but with the fact that his nose was buried in her snatch, that wasn’t really going to work. The only thing he could do was work his tongue desperately around, like a worm writhing on a hook.

His head was already starting to spin, getting low on oxygen, but he was extremely tough. He could take this. His tongue was already aching, juices dripping down his cheeks and neck. His head was spinning, but he didn’t give up, digging his hooves into her massive flanks and rubbing them softly.

Thinking was getting hard. His tongue kept working, digging up and down, then in a circler motion, doing everything he could to bring pleasure to the Princess above. Eventually, he ran out of air however. His hooves dug into her flank, the pillowy flesh giving way and sucking in his hooves. His lungs were burning, and his instincts took over as he begin to desperately beat those hooves against the side of her flank.

Twilight simply laughed at his frantic attempts to keep himself alive, but she was a kind princess, and slowly rose her flank up to allow him to finally draw a breath. He rasped desperately, eyes still stinging from the sweat and lungs working desperately to pull oxygen into his tired muscles as he sprawled out across the floor.

The giant of a mare stared down at him for a few moments, then once again lowered her flank down, this time in such a way to not crush him into a paste. He managed to latch onto her clit this time before she got all the way down, and begin to lap at and rub it with his tongue.

Twilight gasped sharply and planted her cunt down atop him, which leaked all over his neck as most of the weight was taken by his chest and Twilight’s hooves. Hearing the moans of his goddess was more then enough to drive him forward, circling his tongue around and sucking softly upon it to please the mare above him, a mare who let out a series of sharp moans, legs wobbling and flank jiggling as she tried her best to stay on her hooves and not fall backwards least she crush him.

He wasn’t very skilled at this, he knew basic female anatomy with the tubes and the womb and all of that was incredibly difficult. Brain no work good without oxygen. His hooves were starting to struggle slightly again, but he doubled down on his efforts, wanting to bring her to an orgasm before he allowed himself to pull away.

Twilight let out a soft moan as her legs wobbled again, before she rooted her hooves against the ground, pulling her clit from his maw for just a moment, then planting it firmly against him the moment he managed to refill his lungs.

His head felt like it was spinning, pleasing a goddess was a lot more work then he had been expecting, but he swirled and worked his tongue around her clit as best he was able, although at this point his movements were becoming sluggish, his tongue was getting tired. Lactic acid? Something something sports talk. His head was fried, every inch of his body screaming out for oxygen. As a guard he had expected more from himself, but he had been holding his breath for minutes at a time with only frantic gasps of air between.

He was going to have to work on that. For now, Twilight seemed happy with his performance so far, her clit being shoved into his mouth with such gusto that he was almost choking upon it. Her clit was about the size of a jaw breaker to the tiny stallion.

With that in mind, he begin to suckle desperately upon their clit, Twilight quivering and shuddering atop him, loud moans making the room shake as it echoed around, Twilight’s juices dripping down onto the stallion and completely drenching everything that had yet to be plastered in her juices or sweat.

His strength was spent, he could barely keep his tongue working, but the mare seemed to be getting close, panting and breathing heavily as she approached a climax. He was struggling to keep his head together, but kept working his tongue as best he was able.

Twilight’s legs gave a desperate wobble, and then with one final howl she arched her back and her juices rained down upon him like it was some cheap pornography movie. He couldn’t tell because by this point he was only half awake and half aware of the situation he found himself in.

He collapsed against the ground, panting heavily as he was finally allowed to breathe properly, he hadn’t gotten chance to take in the sight of her orgasm properly because of how swirly his head had been, but now was his chance to show how much of a professional guard he was. All he needed to do was to get his muscles back into action, climb back onto his hooves and-

Collapse on his face. Yes, that plan hadn’t worked out exactly as he had pictured it, which was a shame, but it couldn’t really be helped. Even his body had its limits, and even as much as he liked to pretend he was unstoppable, that would be the overstatement of the century.

Turning back to face Twilight, he found that she had grown even larger then before, he didn’t know if he had blacked out, or what exactly had unfolded, but she was now so tall that her horn was practically scraping against the ceiling! She was ten times his height, absolute colossal, an absolute unit of a mare.

And her maw was coming right for him, flat herbivore teeth cared for by magic, linked by bands of saliva that webbed around her mouth. As she drew in close, her breath washed over him, warm and smelling of mint, washing over him like a desert wind as it closed around his upper body, those soft lips gripping against his middle as her tongue dove forward like some kind of snake, skilfully wrapping around him and pulling him forward into the damp blackness.

Her tongue had the texture of sand paper, but was warm and squishy as it wrapped around him. By this point he was as hard as a rock, his member twitching needfully between his legs pretty much from the point she had sat on his face, but he had been so focused on pleasing her needs that he hadn’t even taken note of his own, besides of course the obvious need he had for oxygen when she had been smothering him.

Twilight’s voice boomed from the back of her throat like it was the cave of wonders or something.

“Go on little mortal, now it’s my turn to pleasure you, do your best to get off for me~”

Her tongue wrapped around him and squeezed tight like a snake, soaking him in saliva as the flexible muscle took full advantage of its might, and he followed her orders without question as always, desperately humping against her tongue as he moaned in pleasure, his cock already spurting pre.

He never considered himself to really be into vore, but he was somewhat zealous in nature, and right now being so powerless to his Goddess, it was one of the most arousing things he had ever experienced, grinding and humping against her tongue as it swirled him around the inside of her maw, mashing him against her cheek and rolling him over as he was coated in saliva, his armour drenched, his mane plastered.

He loved it. He couldn’t see exactly what was going on, but as he was mashed into her cheek, he let out a loud moan, his member twitching rapidly as it leaked pre all over her tongue, which led to Twilight giving a soft moan, followed by a chuckle as she ground her tongue against his length.

Farsight wished he could have held back his climax, or enjoyed this moment just a bit more, but unfortunately he was incredibly worked up and, that tongue felt so incredible that he couldn’t contain himself, a soft grunt rolling from his lips as an explosive orgasm ripped through him, his cock spraying thick ropes of his fertile stallion seed all over her tongue.

Twilight moaned softly, then begin to roll him around her mouth, coating him saliva before gently spitting him onto the ground.

“I hope you had a good time, go get yourself dried off mister guard.”

With that, Twilight stamped off like the Goddess she was, leaving him lying three drenched in saliva and basking in his afterglow.