The reality is that habits become our life. A lot of people start drinking when they experience a loss such as divorce. Obviously he is not taking this very well and not considering the long term effect on his children. This could just be a habit he has fallen into, or he could be an alcoholic. Either way, the best thing is for him to replace that behavior with something productive. You may not get him to see this, but he needs to take positive steps to change his behavior. The kids are watching. The scary thing is that eventually he will be in s condition with his kids in the car. How you handle this really depends on your relationship. I would try to get him involved in something that he can’t drink at, slow him down. If he won’t listen to you, call for back up. Get another man involved. Maybe his dad or your husband, anyone he looks up to.