Therapists should work with what clients bring up in session, not chase their own ideas of what might be, could be or should be. If she has a suspicion that you were sexually abused, she should've just asked you about it directly instead of hinting at, and if you'd given her a no answer, she should've let go of this topic entirely.

I'd ask her 1) if she believes that I was sexually abused, 2) why she keeps hinting at it instead of talking about it directly and if she admits that she suspects sexual abuse took place I would just inform her that no, it didn't and would politely ask her to let go of the subject. If she refuses to let go, I'd fire her immediately. It's unacceptable when a therapist is pursuing their own agenda instead of responding to a client's needs.