I'm so sorry LMS. I am truly out of supportive words or advice due to my own situation. All I can do is hope and pray they "get it" and pull thru to the other side of the battle.
I'm working on my own detachment, but its sooooo hard to not get pulled right back in. We're MOM'S. That's what we do. I will go to the grave loving and wanting for them to be nothing but happy and healthy. Hang in there and take solace in knowing you're not alone.