His going to AA is a good thing but it still does not mean he has or will stop drinking. I think that it is a bit of a myth that the alcoholic hits AA & becomes 100% sober & responsible. Some alcoholics find AA meeting to get the law or family off their back about drinking. Others AA members continue to sneak drinks here and there. Sadly, there is no magic bullet to get the alcoholic sober. It takes a lot of hard work & sometimes, trial and error to become sober.