Sounds perfectly creepy to me. It's an outrageous question to ask a young girl who needs to talk about family problems. If that happened to me when I was 13, I'd have been traumatized by the question itself!

I can't imagine any circumstance that would justify that series of questions. If she wanted to determine if you were sexually active, she should have asked outright. Therapists aren't supposed to play games. I think she was taking advantage of the power differential for her own voyeuristic pleasure.