No disrespect, but without knowing any more than the little said here, I’m willing to bet the sexual molestation has everything to do with her behavior. Unless she is emotionally turned on and lusting, each time he touches her she relives the molestation. It is also possible that she blames herself in some way, or at least feels degraded by it, and suffers from low self esteem. I wonder if this self hatred is causing her to shut down emotionally. I don’t think he needs to resemble the molester in any way for the abuse to be affecting her. I think the best advice I could offer is for them to go see a sexual abuse counselor. There is nothing nor no one on this board that can provide the therapy needed to cure this.
I don’t even want to get into the age difference at this point.