I don't for one minute thing you did the wrong thing by introducing your step-son to Alanon. He obviously has issues with his father's drinking and I don't think you put those issues in his head. If you are a person he trusts to share these feelings with you can't shut down now and let him fend for himself. I would encourage him to tell his mother the truth about how he feels and what is really going on in the home. I am in a similar situation right now but it's with my 7 year old daughter and she is nothing but vocal about how her dad's drinking makes her uncomfortable. My husband is being forced to look at his actions and how they affect his children. Unfortunately for me he is not taking the road he needs to in order to avoid losing his family and you may be faced with that at some point. Then you will need to decide what YOU are going to do for YOU.