She ducked into the stall again as someone walked in. She could see through the crack in the door that she had run to the wrong bathroom. It was a skinny goth boy, he stepped past the stall she was in and got into the next. She heard him unzip his pants and sit down. "Oh shit, how am I going to get out of here?" she thought. The she heard him rubbing something "Oh no! He's masturbating!" She soon felt a heat flash through her crotch, she pulled off her skirt to see to her horror she was growing not one but two dicks, with balls to match. She covered her mouth to stop her scream.
They got bigger, reaching six inches and they kept growing, he cam. She felt the heat go away, her dicks now close to a foot and a half, her balls like baseballs. She thought he was finished, but he started rubbing again, now she felt a heat flash in and under her arms, she looked down to see she was growing a second pair of arms, and she was getting muscular in her original. He finished, she had two foot long dicks and baseball sized balls, big lips, basketball breasts and four strong arms. Then she remembered that she needed sex to get back to normal, he had stood up, his pants down while turned to pee.
She got out of her stall, the changes strange to her body, and pushed to door in his, before he could react she slammed him against the stall's back wall and mounted him, both dicks slid into his ass, she put her hand over his mouth to stop him from screaming.
"I need you." She whispered, she thrust into his ass again and again, shoving deeper and deeper into him, he tried to scream, tears streaming down his face, she didn't care, this felt so good. She finally cam, his belly filled, and her arms, dicks, lips and breasts returned to normal, he passed out and fell to the floor. Jen put her skirt back on. "Thank you." She whispered and walked out of the bathroom.