Jen assessed her options, pill in hand. After some risk assessment, she concluded the safest would be to try to infect the girl ahead of her. Jen pushed her pen to the floor to give her some cover, in case anyone was watching. She leaned down to grab it, dropping the pill in Kayla's chip bag. Then the wait began.
It took a few handfuls, but on the third Jen saw the little white pill in the pile of chips and crumbs Kayla had fished from the bag. Success! Jen watched with great eagerness as the poor girl began to shift, the pill's effects beginning.
Kayla stood up from her desk, staring straight ahead. She was short, and kinda curvy, but she seemed to be putting on some weight before Jen's eyes. Her ass got a bit bigger, her thighs too, and overall she seemed a bit chubbier. As that slowed down, Jen felt disappointed that the curse had only made Kayla a bit curvier, a bit more pear-shaped, but hadn't done anything else. Just as she thought this, though, the pill entered stage two. Jen watched as she turned around, and then cringed as the girl's head turned 180 degrees, now facing behind her. Her neck started to shift, and it looked an awful lot like she was growing another one down from her head.
Jen watched as another body formed, facing her first one. This second body grew and grew until it was a fair amount taller than her original, causing her to lean over uncomfortably to keep both sets of legs on the ground. Her second body then gained more form, and Jen perked up when it became clear Kayla's second body was that of a very muscular man. Since her second body was naked, she could tell it was very well endowed. Soon the final details of her new body were fleshed out,and she reached into her backpack with her new arms, grabbing a set of clothes. She got dressed in front of the class, Jen noticing how her new genitals swung heavily. When she was all dressed up, her new back body picked up her old one, and she wrapped her chubby legs around her new torso, draping her arms over her own shoulders.
Kayla then squeezed into her chair again, sitting on her own lap, her massive thighs spilling over the sides of her new body's legs. She looked uncomfortably squeezed into the small desk, which was never designed for someone with a body like hers in mind. She reached around her own original torso, trying to write notes, while her original arms reached back for more chips. She shifted uncomfortably, and Jen could see her cheeks turning red. Jen wondered if the way her breasts were forced against her new torso, and the weight of her ass and legs on her lap was turning her new body on...