Learning and Yearning

by PegPony

Rating: mature
Tags: Twilight Sparkle, Profanity, Twilight Sparkle (EqG), My Little Pony: Friendship is Magic, Human, Porn, Fetish, Equestria Girls, Sex
Length: 3903

Princess Twilight runs some "tests" on an Earth horse

Princess Twilight is getting bogged down with her day-to-day royal duties, but then she comes across a task that she might enjoy, she needed to go back to the human world to learn about the horses and observe just how different they are. However, the powers of nature have other plans and Twilight ends up getting more than she bargained for.

This story was written for: TwiDavid

Published 2021-03-01 23:40:00 UTC
Last updated 2021-03-05 23:38:48 UTC

Heat Wave

Twilight made her way to the room where the mirror was being kept, standing either side of it were two royal guards who stood at attention when Twilight entered the room.

"Your majesty!" they both said in unison and bowed before her.

Twilight rolled her eyes slightly and said "Stand down, I wish to visit the human realm, see to it that nobody follows me. If people wish to see me or question my location, see to it that everyone is informed of my whereabouts and that they must remain calm. As my adviser, Spike shall be left in charge in my absence. Is that clear?"

The guards nodded their heads and again, in perfect unison said "Yes your majesty!"

Twilight smiled "Excellent", then she carefully stepped into the portal. When Twilight came out the other side, she was surprised to find that her appearance was different since her last adventures, she was slightly older, taller, much more curvaceous and... what were those things? Twilight noted she had two odd melon-shaped things on her chest and she had absolutely no idea what they were, it was at this point that she also noticed that the portal had seen fit to give her the same clothes it always gave her, just bigger so that they fit her properly. Twilight decided to walk into Canterlot high to see if she could find anybody, but as she started walking she noticed, or rather felt, that there was another part of her body that was different. Looking behind her, she saw that her butt had also increased in size, Twilight didn't get why she was suddenly so... voluptuous.

Suddenly she heard the school bell ring and suddenly dozens of students were pouring out of the doors of the school and among them were seven girls she knew very well.

Applejack, Fluttershy, Rarity, Rainbow Dash, Pinkie Pie, Sunset Shimmer and... well, herself.
The first time Twilight had met her human counterpart was a surreal experience, but after a while they got over how awkward it was, it became especially easy to tell after they had decided to call human Twilight by her name and pony Twilight by her title. From what Twilight could tell, all of the girls in this universe had suffered the same affliction she had, with the curves and enlarged body parts. As soon as Sunset lay eyes on Twilight she gasped "Hey girls! Check it out! Princess is here!"

All of the girls saw her and were immediately cheering and screaming as they all ran towards her in a group to embrace her in a big group hug. As soon as she was released she smiled and said "Hi girls, it's nice to see you too, though is something wrong?"

Sunset raised her eyebrow in confusion "Wrong? What do you mean?"

Twilight said "Well, I know that we have all gotten older and taller but, what's with the body curves, the bigger behind and these weird things on my chest?"

All of the girls giggled a little whilst Sunset rolled her eyes, the others remembered the first time Sunset started freaking out about it and had to explain it to her. Sunset leaned into Twilight's ear and whispered, as the whispering went on her eyes widened slightly, mostly in interest, but with also a slight blush that denoted embarrassment. "Oh... I see... sorry girls" Twilight said as she chuckled nervously.

Sunset Shimmer laughed and said "Don't worry about it, what brings you back after all this time anyway?"

Twilight suddenly remembered why she had come here in the first place "Oh yes! Well it's nothing too dramatic luckily, but I remember you writing to me about the horses you have in this world, while the facts you all told me were incredibly intriguing and informative, I just had to see them for myself to take some of my own study notes."

That was when Applejack came in "Well lucky you Princess! We were all about to head down to the farm to do some horse ridin' and get the breeze going through our hair, we figured it was the best time for it considerin' we got a heat wave comin' on"

A heat wave. Heat. Oh no! Heat! Twilight widened her eyes as she realized that she had completely forgotten that she was just about to go into heat before she left Canterlot and judging from what Sunset Shimmer had told her, while being in the human world changed their outward appearance it didn't actually affect their internal biology, so the heat would be hitting her full force. Twilight cursed her own bad timing, she decided the best thing to do would be to just forget about it and put it out of her mind, she couldn't foresee any circumstance where she would be engaging in any kind of sex anyway, let alone running the risk of becoming pregnant.

When Twilight realized she had been silent a little bit too long she got her mind back on track and says "That sounds perfect! Though, understandably, I won't exactly feel comfortable riding the horses. I don't suppose you'd mind if I just stay with a couple in the horse pens would you?"

Applejack said "Aw shucks sugar cube, I don't mind none! We'll all go ridin' and you can just study to your hearts content in the barn, so long as you don't feel too lonely."

Twilight chuckled, "I'm sure I'll be fine" she said. With that, all the girls waited at the bus stop until the bus to Sweet Apple Acres arrived and they got on, anxious to get down to the farm and enjoy some casual horse riding fun, well, except for Twilight who was anxious to enjoy some casual horse study.

Stallion Study

Applejack wasn't kidding when she said there was a heat wave, the journey on the bus left them all sweating and constantly drinking from the bottles of water that they had in their bags, they were practically panting like dogs. Eventually the bus came to a stop and all of the girls got off the bus as fast as they could into the gentle but ever-present and cool breeze that blew through the wide open spaces of Sweet Apple Acres.

Sunset Shimmer took in a deep breath through her nose and let out a satisfied sigh "I know I say it every time, but this place just reminds me of home". When Twilight got off the bus and, for the sake of curiosity, mimicked Sunset's actions, she did have to admit the farm was the only thing that really came close to being a little slice of Ponyville in the human world.

Applejack opened the gate that led to her home and said "Alright y'all, you ready for some horse ridin'?" The girls all cheered, Applejack laughed and said "Alright alright, come on then". Applejack led them all to the barn, inside were about eight horses, five stallions and three mares. "Alright y'all, take your pick, but remember you can't ride big ol' Vanta over there", when Twilight looked over to where this so-called "Vanta" was, she saw a big stallion with a shiny black coat and mane, the unfortunate side affect of seeing this particular horse was that when her pony brain registered the sight of what was clearly a very virile stallion, it sent signals to the rest of her body that kicked her reproductive organs into overdrive, immediately beginning the heat that would get her pussy primed and make her fertile.

Twilight blushed as she felt a burning sensation build and rise in her groin "Um... why can't any of you ride Vanta?"

Applejack said "Well first reason bein' that he's the horse you're gonna be studyin'" she said, then continued by saying "Second reason bein' that while you can technically ride 'em, breeding stallions aren't really meant for ridin' purposes". Hearing that he was a stallion specifically bred to impregnate mares didn't help matters, she hoped that the others would chalk up her sweating down to the heat of the sun rather than the heat in her crotch. Twilight decided that she would at try to make a casual attempt to study a different horse, she was afraid her hormones might distract her and disrupt the data, that plus the scent inside the barn was sending tingles of pleasure up her spine and she didn't want to admit that the smell of these beasts was making her aroused, horny, subconsciously begging to be fucked at all costs.

"Um... If he's a breeding horse, wouldn't one of the mares need to stay here?"

Unfortunately for Twilight, Applejack said "Nah, no need. None of them have started their estrus cycle yet, that is to say that they aren't in season, so matin' wouldn't really be practical". Twilight was in heat but these horses WEREN'T?! The lucky bitches. Seeing no alternative, she decided she would just have to study Vanta and hope the chemical reactions in her brain didn't affect her memory or her study methods, she was here for information only after all. After that, every girl chose a horse and gently trotted off into the field for a relaxing horse ride, leaving just Twilight and Vanta there in the barn.

Twilight nervously approached Vanta, cleared her throat and focused on the one thing she was there for, the quest for knowledge. She began to take note of the various differences between the ponies of Equestria and the horses of the human world, for one thing their legs got slimmer towards the hooves, not thicker. The muzzle was much longer and everything was overall much larger, including the genitalia, wait... the genitalia?! Through all of Twilight's mental notes, she hadn't noticed Vanta's cock slipping out of it's sheathe in front of his big swinging balls. Vanta was sniffing at Twilight, eagerly drinking in her scent, it was then that Twilight realized the predicament she was now currently in. She was in a heat and a very strong heat at that, but because she was still a pony on the inside, Vanta didn't particularly care what she looked like, all he could register was that there was a thick layer of "I'm a mare, please fuck me" hormones surrounding Twilight and his body was responding, by becoming more and more erect by the second.

Twilight wasn't faring much better, she seemed hypnotized by the mass of stiff stallion cock in front of her, her body and her brain were urging her to simply leap at the thing and do everything she could to please it while they were still alone, still had the chance, the girls wouldn't be out there riding horses forever. Twilight shook her head rapidly, she had to come to her senses and continue her pursuit of simple and pure facts, not to became abnormally interesting in the junk of handsome stallion. Though she did have to say that even being aware that horses were overall larger in every aspect, she could see why he was a perfect breeding stallion. His cock was long and turgid, his nuts were practically churning, as if the huge cum factories were already preparing several loads for the next mare they would have the pleasure of filling, he was also certainly quite muscular, she could only imagine how well he could thrusts with strong well toned hips like that. Holy fuck he was hot.

Twilight bit her lip and looked to the barn entrance, which was now closed. They had only started riding 5 minutes ago... surely she could indulge herself just a little bit, just to satiate her lust... for answers! Answers to questions that had to be asked! Like if interacting with Vanta on a semi-physical level would help her quench her heat or exacerbate the situation and simply magnify the voice in her head that was just screaming the words "FUCK HIM" at her. I mean, where was the harm in that? All she was doing was examining things, it was totally justifiable, even if she moaned out loud as she pressed her face into his hot sweaty nut sack, taking in deep breaths of his extremely attractive scent and taking long licks of his rough salty stallion scrotum. OK, she was only kidding herself at this point and the point she was at was the point of no return, she had started after all, so she might as well finish!

Vanta in Vagina

Twilight was too frustrated to let reason cloud her judgement right now, but she was sensible enough to realize she was on a time limit, she didn't really fancy the idea of having all of her friends return to see her "entertaining" Vanta. She stood up and pulled down her skirt and panties, discovering that since her heat had stirred until she found herself with her face buried in his balls, her pussy had become absolutely drenched in it's own fluids. Twilight wasn't a virgin, after becoming a princess she tended to enjoy the company of a stallion or two, so she was readily prepared for sex, though a pony having sex with a pony was a different ball game to a human having sex with a horse. She discarded her skirt and panties behind her and moved to Vanta's side, crouching to get her first good proper look at his equipment.

He was long, black and throbbing, Twilight had never drooled so much in her life. She decided that before getting to the main event, it would probably be wise to lubricate him a bit to make the penetration as easy as possible. She gripped his cock in both hands and pushed the tip in her mouth, as soon as the flesh of his cock came into contact with her tongue, she groaned as the heat in her groin burned with primitive desire. Ravenously she began sucking the head of Vanta's dick as she moved her hands back and forth, eagerly pumping him. As time went on, Twilight attempted to push more and more of Vanta's cock down her throat, however her gag reflex simply wouldn't allow it and so, she had to be content with sucking on his head and the first inch and a half of his dick whilst jerking the rest of him off. It seemed that her foreplay was having the desired effect however, as well as her mouth practically spit-shining and polishing his dick as she bobbed her head back and forth, he had started to leak pre-cum.

It was bitter as Twilight let it trickle down her throat, but the taste wasn't important, what was important was that he was ready to have a good old fashioned romp with her. Twilight backed off of his cock, then turned around, leaning on the fence in front of him and waving her ass from side to side, inviting him to take her. Vanta wouldn't be a very good breeding stallion if he ignored such a clear "fuck me" pose, Vanta shuffled forward and leapt up, hooking his front legs on the fence, either side of Twilight's body. Twilight whimpered with need, anxiously awaiting for the glorious moment when Vanta's cock would enter her pussy, she needed it so badly, she needed to be stretched and pounded and filled with stallion sperm. Size difference presented a slight problem, as Vanta thrusted aimlessly at the air, only occasionally managing to prod at her butt cheek or her leg. However, Vanta's perseverance and Twilight's incredible patience paid off, as the cock of his head finally found home, pushed up against Twilight's twitching and desperate entrance. Both Twilight and Vanta readied themselves, then after a few seconds, Vanta surged his hips forward and with some firm pressing, managed to squeeze his cock inside Twilight's tight little hole as it clamped down on his dick, already trying the milk the cum from his balls.

Vanta advanced as much as he was able, slowed only by the tightness of Twilight's innermost depths, he pushed and pushed until her cervix denied him further access, despite a couple of attempts to push past the barrier, it wouldn't budge. With half of his cock lodged inside Twilight and seemingly not being able to go any deeper, Vanta began thrusting, sliding his dick in and out of her as if she were like any other mare, he fucked her to breed her. Twilight was having the time of her life, her inside felt like they were on fire, the heat of Vanta's pulsating member, coupled with the almost painful warmth of her hungry womb, created a wonderfully spine-tingling sensation of warmth and pleasure that spread throughout her body as if it were coursing through her veins. Twilight's tongue practically fell out of her mouth, as her eyes rolled into the back of her head, she remained conscious, by holy fuck was it a struggle not to faint from the sheer over-stimulation her body was receiving from this beast's sturdy fuck pole.

Vanta kept going, beginning to pound harder as his swinging nuts prepared to release the substantial load they were holding into Twilight's ready and waiting womb. Twilight, through extremely strong will power and the want to feel every single second of Vanta's fucking, kept herself conscious, but it was starting to have an effect on her mind, she was drooling uncontrollably and giggling like a woman gone mad, her hair was a veritable mess and the shirt and bow tie she had opted to keep on had become disheveled and partially hung off of her body. Twilight felt her butt jiggling slightly and her tits bouncing back and forth with every thrust Vanta gave her, her skin felt prickly and itchy, with an almost stinging sensation, her hair stood on end and she bit her arm, her teeth almost sinking in enough to draw blood as she let out a muffled cry of ecstasy and had the most intense and amazing orgasm she had ever experienced in her life. Despite her muscles relaxing, the orgasm never truly ended while Vanta was still fucking her, however the fact that her body had gone limp and Twilight had just gushed, meant that Vanta got to enjoy a much looser and sloppier fuck hole, which quickly brought him to his own orgasm. This was actually a good stroke of luck, had the sex continued much further, Twilight;s mind may have well gone blank and left her a shivering and quivering ball of girl gone insane from pleasure.

Vanta's cum rocketed out of his dick and every single last drop of his essence was squirted into Twilight's womb, Twilight felt a wave of satisfaction overwhelm her as the crippling heat of her heat vanished and was replaced with the comfortable warmth of stallion seed. Twilight looked down and chuckled at what a mess she was, her belly only slightly distended from the amount of baby cream now being held inside her. Vanta dismounted and gently pulled his softening cock out of her, though that was the only thing that did come out of her pussy, his load deposited inside her and kept in by her tight unyielding cervix. The timing was actually perfect, for by the time Twilight had gotten herself cleaned up and looking somewhat presentable, the barn doors swung open and in came the girls still atop their horses.

Applejack smiled and said "Hey Twilight! You get what you were looking for?"

Twilight nodded, a picture of innocence and said "Yes, I got plenty of what I needed and then some, thank you very much"

Applejack said "Ah don't mention it, always happy to help out a friend. I suppose you'll be headin' on back to Equestria huh?"

Twilight sighed and said "Yes, unfortunately royal duty calls, maybe at some point in the future I'll set aside some time where I can come for a casual visit"

Sunset Shimmer nodded "Sounds awesome, say hello to Celestia for me will you?"

Twilight chuckled and said "Sure thing".

Then Twilight got a bus back to Canterlot high and stepped through the portal. As luck would have it, nobody had noticed her sudden absence and there were no messages to deal with, at least that's what her guards said anyway. Feeling refreshed and ready to face the last few hours of the day, she went back to the paperwork she was sorting.

-6 weeks later-

Twilight waited anxiously, how could she have not thought about this before? Why didn't she take into account the possibility that Equestrian Ponies were genetically compatible with Earth horses? There was always some kind of oversight! Something she had missed! It annoyed her to no end that she hadn't considered the repercussions of her one moment of insanity in order to gain some instant gratification. Seeing the tenth pregnancy test she had taken once again come up positive, Twilight admitted defeat and accepted the fact. She was pregnant. Twilight took in a deep breath and then let it out, as she remained calm, she said one thing that perfectly summed up her situation and how she felt about it.

"Fuck".

The End

Author's Note

Thank you TwiDavid for this incredible story idea! I hope you enjoyed it :)

Epilogue

Something has gone wrong. We don't seem to have an archived copy of that chapter.

Prologue

Princess Twilight was sifting through paperwork, ever since becoming Princess of Equestria, her list of duties had just increased tenfold, she had to raise the sun and moon, deal with dignitaries and attend events during the day, then had to visit the dream realm during the night. She wished that Celestia and Luna hadn't retired, but she understood that after a few thousand years of being the only monarchs in Equestria, they might want to move on and shift their duties onto somepony else, but that didn't mean she found it easy to deal with. Spike was always eager to help, but there was only so much he could do, especially considering he had his own duties as ambassador of friendship to the dragon lands, she would call upon her friends, but they all had their own lives to lead, she couldn't bother them over every little difficult task. She had defeated villains and battled monsters and she couldn't handle paperwork?! She knew she had the right to feel stressed, but it just seemed so small compared to all the challenges she had been faced with ever since she moved to Ponyville, now she was living in Canterlot with an unending list of royal duties.

When she was done with the paperwork however, the next task on the list Spike had prepared for before leaving for some kind of friendship negotiation meeting, was much more interesting. It involved travel, but not just any travel, her next duty was to return to the human realm to study the equines that existed in their world. According to Sunset Shimmer, they were very very different and Twilight had made it a goal to, at some point, study them in the flesh. Shortly after her ascension to the throne, Twilight had the mirror moved to Canterlot Castle and guarded at all times in case something or someone with malevolent intent came out of or tried to go into the portal. Twilight figured now was as good a time as any to visit the human world and study what kind of horses existed there.