A familiar smell hit my nose. It was Jesse.
"Hey slut..." he said as he slapped my ass. The feminine, round rump jiggled around, even though it was back to it's 'normal' size.
"I see you found someone to fuck that little ass of yours. Good for you, I was hoping it would be me, but that'll happen soon enough. Actually it's quite nice having you like this in that sexy little body, I get to show the class the full process now."
What the hell was he talk-....oh fuck! We have the same classes for pretty much the rest of the day, no wonder he targeted me. And this bizarre curse, I had to find a way to break it before I did something stupid like get knocked up. That would stick me in this horse body for at least about 9 months...or however long horse-anthros gestate. Then what? Would I ever turn back? If I ever wanted to be a human male again I had to give up on sex completely, no orgasms until I changed back. I was already stuck like this for 3 days, plenty of time for Jesse the stallion to put one in me.
I stopped in my tracks, realizing that I had been following him, just behind and a little to the side. We must've looked like a couple already, the big stallion and his little filly fuck-toy. My ears were flat against my head, and my nose drooped. Who knew girls felt like this, or did they? Was it just part of Jesse's curse that made me so horny and submissive? I mean...I offered my tailhole right to Andy as soon as he walked in the door...
I hurried to catch up as Jesse rounded a corner, but found him stopped right there too. "I see you're getting plenty of attention, it's not just my dick you want. And that's a problem, slut." His new nickname for me wasn't very flattering...but terribly accurate. With one swift motion he grabbed the back of my neck and forced me to bend over, his other hand lifted my skirt and started to tug at my panties. "Nnnngh! Stop!" I shouted, already people were passing by and laughing. They wouldn't do anything to help, not only was Jesse a foot taller in his stallion form, but this was unofficial school policy. If you got yourself turned into a girl, you were at the mercy of every guy in school until you found a way back.
My ears pinned back again when he started laughing, a finger probing at my filthy rump. "Wow, who ever came in your little asshole dear? He left quite a mess. I'll have to pick up some literature on feminine hygiene for you. Later though, I want the same treatment with my seed, slut..." Though it was clear he wasn't after my ass, he wanted my aching little pussy wrapped over his cock. And he was going to get it. Even if I had the ability to resist I doubt I would have. Just being near a stallion, not just a male, but a full fledged, heat packing stud of the same species as me...
Instinct made me it's bitch, maybe moreso that Jesse was. I nickered as he dug a finger into my slit and dragged my wetness up along my pisshole and my clitoral hood. His nail pressed against it, then exposed my little clitty and started rubbing my slick juices all over it. It made me crazy, but he was quick to bring attention upward. His other hand groped at my breasts, trapping one of my thick nipples between this finger and thumb. I squealed and wiggled, but it wasn't enough to get me away. He released my nipple and grabbed his thick shaft by the base before pressing it inside. Just the tip made it in, and I was lost. My lips struggled to contain him, constantly trying to push him out, but I felt that only encouraged him to go deeper.
He dug his hooves into the ground, turning slightly and lifting up one of my legs to put my snatch on full display for the students around us. Without a word he slammed half his cock into me, the feeling of pain made me scream, but the pleasure that followed made it all (almost) worth it. I could only think that this was it, everything was lined up perfectly. We were just two horses (half horses, really) fucking in front of a few humans who stopped by to watch and chuckle. That's when it happened.
Maybe he thought I was enjoying myself too much, but he took my throbbing pussy walls as a sign that I was close to orgasm. He jammed a thick thumb right into my soaking tailhole and twisted it around. "Nnngh! Nnno please! Jesse don't!!" is all I could get out. Bent over like this, with his thumb in my ass, only one sensation (other than the cock buried in my twat) was on my mind. My tummy rumbled, and with horror I let out a deep "fffffrrrrrt!" sound again. The crowd gasped, then laughed at the effect. I prayed for it to stop, but it wouldn't.
My thighs felt it first, sore from the thrusting stallion behind me. They plumped up and grew heavier, jiggling more and more with each pound they added. Then my ass, already squished against Jesse, it swelled on his pelvis and fattened terribly. He seemed to enjoy the feeling, all the flesh closing around the base of his cock. From there the sensation traveled up my belly (making that plump out to match my new figure) and divided into my breasts. That was the worst feeling, mostly because it felt so heavenly. Just as good as his fingers on my clit, just as good as his thick cock dragging over my swollen G-spot, my breasts swelling was all I needed to get there. They ballooned out beyond matching proportions with the rest of me, giving me a top-heavy look, bringing me up to DD cup breasts easily. His thrusting grew irregular, but quicker. Sweat formed on both our bodies, and the stanky musk only added to the scents in my nose.
With one final thrust he buried himself in me all the way, I didn't realize my depths could go that far... then his cock throbbed along my walls, passing rope after rope of thick cum into my passage. I whined and whinnied under him, my own orgasm capturing me and making me arch and shudder. On cue my swollen tits let loose and sprayed a deluge of milk all over the wall. Another orgasm, another day in this body...
I realized that my knees had given out, and that his hands on my hips were the only thing keeping me up. This became clear when he slid his dick out from me and dropped me into a puddle of my own fluids (and his as well.) Another slap across the face, and he brought my lips up to his dick again. It stank, both masculine musk and the heavy feminine juices I had spread on it glistened. I had no agency to refuse, I wrapped my mouth over his tip knowing full well what was to come.
His piss filled my mouth instantly, it was either swallow it or drown in it. Gulp after gulp he filled me, my stomach aching as he passed at least a gallon of stinky horse piss into me. There were some "ew!" sounds from the audience, and a few more gasps of disbelief. It was embarrassing enough to get turned into a HUMAN girl in this school, but a slutty, farting, mare who just can't say no? People were going to tell stories about this, my reputation (or what was left of it) was just destroyed in the space of a 10 minute fuck.