Talk to her

You open and close the door, making as much noise as you can, then walk around the privacy wall and stop short in pretended surprise.

Your act is wasted. She hasn't heard a thing, obviously totally immersed in the music in her head phones. Deciding on a direct approach you walk up to her supine body and tap her bare shoulder. She looks up startled, then sits up, pulling off her headphones and holding the towel against her chest.

"Do you have permission to be here?" you ask sternly, cutting off any words she might have had.

"Um, I didn't think I needed permission," she says uncertainly. "I just took a shower, that's all I did."

"What's your name?"

"Noelle. Noelle Dupont. I'm a student, a first year student. They said it was ok."

"Who said?"

"Umm...some guys, maintenance guys. They said it was ok to use the shower," she looks up at you anxiously, trying to stop the towel from slipping. "Am I in trouble?"

"That depends on what else you've been doing," you answer.

"What...what...do you mean?" she says nervously, a flush of embarrassment darkening her pale skin. "I just had a shower...that's all...really...."

"I'm not sure I believe you, but let it go for now. The security cameras will have recorded everything and we can see if you're lying later."

"Security cameras!" she squeaks in alarm, her face horrified. "There are cameras in here?"

"Why should that worry you if you weren't doing anything wrong?"

"Ummm....but...but...they could see me...umm without clothes on."

"That's of no concern, as long as you weren't doing anything you shouldn't be. I'll go get the headmistress and we'll review the tapes. If there's no problem that will be the end of it." You turn as if to leave, trying not to smile at the expression of utter dismay on her face.