I'm new on here but have read the background to this and something similar happened to me and I wish I'd handled it differently. Your son is at a funny age and unlike what a previous poster has said, he is not in control of his life, legally, as he is classed as a minor under adult care. From his perspective you have taken the stepfathers side, this step father who has shown some very dodgy behaviour in the past (documented in your older posts) both to you and your son. Ask yourself this, if you separated from your husband and asked your Son to come back and live with you, just you two on your own, would he come back? I would bet he would, straight away. Personally I would not believe a single word your husband has said about what has gone on between him and your Son, Adults can be very manipulative and your son could be genuinely scared of him but not dare show it to your face. He has said YOU have done nothing wrong, does this not indicate that SOMEONE has done something wrong? Sorry if this sounds brutal and its just my opinion but from bitter experience children are much more important than manipulative husbands. Try asking your Son if he would come back and live with you if Step-father was out of the picture , then ask him in confidence what ACTUALLY has happened between them because something major must have and you need to get to the bottom of it.