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 :)