Yeah, my initial thought is that it does sound like a bit of a flimsy case for a woman having sexually abused you, yes. And to suggest it could have been your mother, wow. It's almost like they're convinced it is your mother. Mind you, I don't have the insight into your case or the mental health training that the therapists and psychologists do.

I guess, keep your skepticism but at the same time, be honest about what your therapy is revealing to you. Best of luck with everything too.