If he is not working a strong recovery program, all he is doing is white knuckling it and IMO that will lead to failure...once again.
My only concern is for your young child, a child should never be exposed to addiction of any kind.
Cynical One has a great post on the F & F of Substance Abusers Forum...about returning home, has he changed or is it wishful thinking. Might
be worth a read.
I hope this all works out as you envision it to.