Mark, You can try to offer your support regarding the sleepwalking, but my guess is you have little credibility regarding being supportive. I don't see it being a successful conversation. However, it will let it be known that you are concerned. There's no harm in that. Keep your expectations realistic.
Keep working on your own happiness. Use the freedom you have to cultivate a positive life for yourself and children. I think it's great about your joining a men's group at your church. As you fill your life up with positives, you will continue to get stronger, and it will be easier to develop boundaries (emotional and physical) with your W.
CL
CL 53 W 54 M 20 yrs. 03'-09' Separation + Old Patterns + GAL 10-14' Piecing
"The Master allows things to happen. She shapes events as they come."