I am so sorry for what your son is going through. I can't imagine the anguish that you feel watching your son fall apart. My prayers are with you.
I don't believe that moving back in with your H is going to resolve the issues. First, I see that there will be a lot of resentment in the household because of where your H stands in regards to the marriage. While we try to hide these feelings from the children, they are way smarter than we ever give them credit for. Ultimately, your S will pick up on those vibes. Additionally, how would he react if your H decides that your son is better and its now time to part? I just think that would be even more damaging.
Honey, I would be very concerned about you in that sitch as well. I think that this could be a very painful living sitch for you and stress you further. This would not be good ultimately for a possible reconciliation down the road. I can see a lot of resentment building between both you and your H.
I think seeking some good counseling for your S is a great idea. Family counseling an even better idea.
