He knows he has you scared. I think it is the Lundy book that says the alcoholic loses the ability for guilt and remorse because of the substance. Your Mom is from a different generation. It is already effecting your kids. Document everything. Do not engage with him if he is using or under the influence. My situation got scary also. Get the PO. Talk to an attorney who is aware he is an alcoholic who could put your kids in danger if left alone with them. Protect your kids. Leave the kids with your Mom and make an Alanon meeting !