It's really nice of you to take this girl in and try to help her overcome some of her problems. I bet the counseling service you heard about on the radio or a sexual assault hotline would have some great ideas about how you could best help her with these issues.

Does she know that you know? Has she talked about this with you herself? If I were an abused teenager moving in with someone, I would not want to feel like they were prying or confronting me about abuse that I might not want to talk about. I would be happy to be in a supportive, stable environment where I could access help if I wanted it.