I think you should bring it up. I know it's extremely hard to do, but my experience was when I broached it it almost took the pressure off. I said, I think x might have happened, but am not sure, and it was ok to not be sure. Then over six months into therapy I was able to talk about some of the more grim details and symptoms - the reasons why I had sought help to start with and thought I'd be able to start talking about straightaway but couldn't. I have had a rather mad rollercoaster through therapy but I think one reason that keeps me going to my therapist is the exquisitely gentle and kind way she responded to me talking about the weird, painful and disturbing sides of my issues around sex and abuse.

You, on the other hand, have a very solid and consistant foundation built up with your T, which is obviously a very valuable resource. I wonder if you are being drawn towards discussing possible csa now because you feel secure enough? Did you ever feel the urge to discuss it before?