My ex DIL has supervised visits only. I have always allowed her to come and stay in my home in order to visit my granddaughter (she is in the military). She never did the court ordered parent classes or this would be waived. It was easier because child is more comfortable in my home and didn't know her mom at first. Now, it is a source of irritation, but I tell her to take the class!
I don't really mind, I observe alot and she has asked for my input on how to or what to do. It can be a blessing for both the parent and child to have someone who loves them both there!!
prayers for you and your son--glad he is still in treatment.
love and prayers,
susan