Brittany waited patiently for Jeff and Elizabeth to leave, then emerged from her hiding spot behind the next aisle of lockers.
So, that was how he did it, she thought. It wasn't his Dad that gifted him with that amazing cock, it was a machine.
Brittany had returned to the locker room shortly after she left. She decided to let the meathead Leslie take care of Cindy. If she didn't find her immediately, it wouldn't really be a big deal. After all, she had already been infected. She was going to change no matter what. It was only a matter of time. And where could she hide? She was going to be an anthro-horse!
So Brittany had returned to check on Jeff. When she entered the room she saw him unconscious, passed out on the floor. No doubt he was worn out from his previous adventures. And that was part of the reason why she had returned.
Brittany had always been curious about Jeff's dick. She had been with several guys, and she had learned that bigger was definitely better. She didn't necessarily want to have sex with him - it was a horse cock for God's sake, and she was not into bestiality. But she wanted to see what it looked like, maybe even felt like.
After Cindy had sex with Jeff, she was even more curious. The truth was that Brittany was not disgusted with Cindy's actions. She was actually a little jealous. It looked like having sex with that giant cock was a lot of fun, and felt very good. After Cindy left, she decided that she wanted to try it for herself. Away from prying eyes, of course, she was no exhibitionist. She didn't want an audience like Cindy. So, she snuck back into the room, intending to impale herself on Jeff's massive rod.
She was about to do it when the door to the locker room started to open. She quickly hid behind the lockers before the person could see her. She didn't know how she would explain what she was doing to the other girls - she didn't want them to know her new sexual desires. She was a little surprised to hear that it was Jeff's freaky anthro-horse sister, Elizabeth. She was even more shocked by their conversation. Now that she was alone, she mulled it over in her mind.
So, they have some kind of machine that can change people into animals, she thought. She had an idea. She could turn other students into anthro-horses, just like her, without relying on Jeff's semen. Not just female students, either, but male students. She could create her own stud farm, with a wide variety of males who could provide her with the means to satisfy her new carnal desires.
But she wouldn't change every student. Oh, no, that just wouldn't do. She would handpick the most popular students, the most attractive students. She would make it a privilege, a privilege reserved for only the select few - the popular kids.
I mean, Jeff is a nice guy, but he's just not that attractive. He's kinda small and runty, she thought. Imagine what I could do with some of the jocks, she thought eagerly. And now she had the means to do it. And she had even overheard the password - Family. The thought to change herself back to normal never even occurred to her. She was excited about starting a new exclusive clique, that would be entirely devoted to her. That is, if they wanted to continue to have the look that allowed them to fit in with the cool kids.
Now all she had to do was sneak over to their house and use it. She ran out the door towards the road at surprising speed.