It's only human nature to make people like you.
...
I didn't expect I would ever see someone say something like this.
You just described my personality with 9 words lol.
I think you should just have a good 1 on 1 talk with her, that you said you clearly told her that you didn't want a relationship with her etc.
As last resort, If she still insisting that she will try to get you out, you can tell her you will get her out too. I mean, if you had sex with her, she had sex with you.
If it's against the rules for you, it's against the rules for her.
If you have to go, she has to go.
She will probably refrain from sue'ing (?) you, because she will have to leave too, so she will have to say bye to all her friends etc.
Edit: I can be a real asshole, so I would do it way to fast. Don't do this as you will most likely not remain friends whatsoever (from my experience, even though I assume after all this you won't be friends nyway, or want to be friends)
only use it as very very last resort