I wish I had some answers for you but I don't. Keep coming back reading and posting it helps. There are alot of wise caring people on this site that can help give you some insight on your situation. In the meantime it would be a good idea for your and your mother to check into alanon to do something for yourselves living with an alcoholic affects the whole family as you already have learned the only thing we can do is focus on ourselves and let them deal with the consequences of their actions. Is there a place that you and your mother can spend the night when he is in stage 2 ? Please try to make arrangements to keep yourselves safe that is the most important thing.
Hugs and prayers to both of you.
Rose