When Jen got to school she didn't even attempt to go to class. She knew where she had to go in her mind as she walked into a bathroom that was used by both boys and girls. The toilet was gone, and in it's place was just a metal pipe sticking out of the ground. Jen walked over to this pipe before bending down and shoving her ass onto the pipe. A small yip of pain and pleasure came from Jen as she sat down on the floor, her legs spread out and the pipe firmly up her ass as she sat there with her new life change.
As Jen sat there however the very first change began. Her asshole, which the pipe was only shoved up at the moment, began to shrink. The skin of her ass tightened until her hole was just gone. She had to asshole anymore, just a pipe shoved into her skin.
Not even a minute later a boy walked into the bathroom, Jen staring at him as he locked the door and pulled down his pants, shoving his dick into her mouth as she moaned, the boy pissing into her as she shallower his cum. When the boy was done pissing his zipped up his pants and turned to leave, unlocking the door as Jen sat there, her legs still spread out as more changes began.
Inside Jen the pipe was growing, slowly replacing her intestines as outside Jen's skin was started to turn white. A slow change, but soon jen would be little more than a porcelain.