I'm stuck in the same place........I even have D15's bf texting me and asking me to talk to my daughter......to explain what's going on. All I can say is that I really don't understand it all. I think it's just best to be as honest as you can feel comfortable with. After all, we've been lied to sooooooooo much, and we know that the truth hurts way less than the lies.
I think your H is in a class all by himself --- and I'm sure he doesn't know what he's doing and why---my only advice would be to try to stop figuring out why he's doing what he's doing, because I bet there is no real explanation...........only the little green men that have taken control of his brain know...
Me 45 M 25 yrs; T 31 yrs;bomb 8/15/06; moves out 7/18/08 D 18, D 14, S 12