I am sure you have already done this, but have you actually said to him that you need to know his side of the story, not because you want to hurt him with it, but because you want to know his side. He is afraid because he doesn't want to hurt you again, which is a good thing, but what you are saying is that sometimes you want to know his side or his perspective not to hit him over the head with it or to hurt your R, but because you are wondering. You need to make sure he feels safe and also make sure that he understands you are looking for his thoughts not necessarily the details about where and when, but how he felt or didn't feel with your or her so you can be sure it doesn't occur again.
Me29 S3 H left 4/1/09 I file 8/2/10 Divorce final 5/17/11 1st http://www.tinyurl.com/25lhu52 2nd http://www.tinyurl.com/2c35ueg 3rd http://www.tinyurl.com/322yk89