Thank you everyone. I'm going to write him an email, and see how he responds before I make a decision. I really like him in other ways, but this is a major issue and ice already had it minimized by stepmother (other side of family, not abusers mother) who said "we've all had things like this happen", and another therapist who said I've had lots of "little" things happen. To be clear....
Given that he knows all of that and knows my memory is fuzzy, how can he minimize this? And also in light of the fact that I have a history of being promiscuous with much older men until I married, with distinct remembrances of being unable to say no.