I think, well from my experience that sometimes I find out something has happened, but it is not my memory has such but the memory of the one who went thru the experience. So it is almost like hearing about something that happened to someone else. I have found that the one who experienced the memory is the one that needs to talk in therapy. Sometimes I do talk to our T about it the next week, after I have listened to the session. ( I record all my sessions on an mp3 player). Maybe you could let the person inside know that holds the memory that it is ok for them to talk to your therapist.