I like the idea of going over to his place to help. Plan fun things in the evening with him like watch movies. Also, give him a recommendation to this site! It really is up to him to stay sober. I used to sneak out of my dad's house when I was staying with him to drink, and I was 30! It sounds like he found a lot of good tools in rehab and he will use them. If someone wants to drink it really doesn't matter what kind of supervision they're locked up in a bedroom. I will say though that having my parents around does help me to stay sober.