My ex husband has just completed his rehab after having been there for around 8 months. He had an addiction to Valium, sleeping pills and pain killers, but swears he wants to be clean again now. He has previosly been to rehab where after 1-2 weeks afterwards he starts using again. I have mysself had an addiction so I know what he's going through. The probelm is that I don't know how much contact I want him to have with the kids, if he does start using again. What would be the smartest thing to do?