If she does anything, she's an idiot. Honestly, just avoid her and do whatever you want. Especially avoid her when you are alone or unsupervised, or just out of school. Otherwise, someone is going to stop her, and she'd get in trouble. I wouldn't worry about it honestly. But, if your nerves aren't calm from that, just stay in public view while you are at school and outside. Most people like that won't do anything if someone will stop them or get them in trouble.