Lydia hurried into the girls locker room. In her haste, she didn't notice some water on the tile floor and walked right through it. She hoped it wouldn't matter. Lydia got her bag out of her locker and turned to leave, but almost fell with her first step. She steadied herself against a locker and looked down. The red spandex of her swimsuit was now down to her ankles. She carefully tried to take another step and realized the problem: her thighs were stuck together. Lydia did her best to shuffle along toward the door.
She made it part of the way, but lost her balance and fell. Flailing for something to stop her fall she grabbed hold of a handle of some kind, only to have it turn in her grasp and her hand slip off. She quickly realized what had happened: she'd fallen into a shower stall and grabbed the handle that controlled the water. She tossed her gym bag clear before it got more than a light sprinkle, but as she struggled to her knees Lydia knew it was too late for her. She could feel her knees and feet losing form as her transformation into a mermaid accelerated. She managed to grasp the handle and turn it off. Not that it really matter. Lydia flopped on her backside and examined the red lycra tail spread out before her, a white stripe down either side. Her tailfin was a darker shade of red than the rest of her body.
Lydia was fully a mermaid again and the only thing that could transform her back was sex with her boyfriend. But she was in the girl's locker room and the rest of the swim team would be in here soon. Should she try a quicky? Could she hide until the rest of the team was gone? Could her boyfriend somehow sneak her out of here without her tail being noticed?