Do NOT feel guilty. You are trying to do what is best for your son and speaking from experience he needs to stay away from your H's house for a long time. At least till the RM leaves and your H is in recovery. He needs to be in a clean environment any way he can.
Me:40 W: 39 T: 17 years M: 15 years S-9 D-6 D final 11/10/2009
"We are all faced with a series of great opportunities brilliantly disguised as insoluble problems."