The girls didn't make it far before the heat became too much for then to handle. Every sneeze progressed their changes, and made any girl in the area start to change as well. Jen walked into the main hallway and was shocked to find a number of herm-equine girls fucking or masturbating in plain sight. Which sent her into a deeper and more intense estrus.
She couldn't make it down that one hall without stopping to fuck someone, be fucked, or jerk off while watching another pair of horse-herms getting it on. Jen couldn't stop herself, and the more she fucked the more she changed. When the first period bell rang, Jen was almost completely equine. Her body was covered in palomino hair, and a long white mane had grown from the back of her neck. There was a tail of similar color hanging over Jen's puffy horse asshole. Jen's ears twitched back and forth atop her head. She proudly displayed her cock and balls. Her pussy dripped mare juice everywhere, enticing anyone who approached her, male or female.
Jen knew deep down that this was just because Kyle cursed her. And that if she wanted to, she could use the curse to set things right. But the estrus was too powerful. Her pussy was constantly inflamed, weeping mare-juice everywhere. And no amount of horsecock seemed to satisfy her.
That first class was the worst. Jen was so horny from seeing all her classmates turn into slutty horse-hermaphordites and fucking each other senseless. Jen was so needy, that she'd pushed her chair backwards and closer to Beth's desk. That way Beth could could fuck her with causing too much of a scene. But horse sex was still a loud and messy business.
Jen sat there moaning and tweaking her nipples, while humping the bottom of her desk as Beth rammed her from behind. And when the two came, they couldn't contain their whinnies. Thick, chunky scum poured out of Jen's shaft, while Beth's load was lost inside Jen's massive horse cunt. Even more of the stuff got caught in Jen's tail and dried on her asshole. Her lips contracted over and over around her friend's shaft, milking it for every drop of cum.
"I have to stop this. No matter how good it feel, and fuck it feels awesome, I don't want to spend my life in heat. I could get used to the other changes, maybe." Jen thought as she stroked her cock into an erect state again. By the time her first class was over, Jen had orgasmed a total of six times. And each left a larger pile of cum on the floor. Jen left a veritable pool of the stuff behind as she exited the classroom.