The hardest thing to do is to let go. I know about having children with a MLCer. My 9 D thinks her mother has a boyfriend, I just try to reassure her that no matter what happens, things are going to be alright. We just have to keep praying and working on our selves. I am trying to work on me, trying to give her something to want to come home to while I continue to get my children every chance that I can. I am the only stability that they have in their lives at the present.
My advice is to give her lots of room. Don't give her any reason to feel pressured, this is my weak point. I find myself asking for a hug or trying to take her hand and both of these are big no-no's. We have no control over how they act or what they do. All we can do is try to give them something to want to come back to. This is a long tough ride and they say it lasts for years. It is funny, I don't remember paying for a ticket even though it is one hell of a ride. As Faith and Hope says "There can be no testamony without a test".