sorry you are dealing with this...but everyone is correct..no contact. I have a young son and still maintain no contact with stbx's mother. When I went to her for help with his sex addiction and affairs, she suggested that maybe I didn't give her son enough sex. What an idiot. She also tried to insist that our son live with her and I could visit him...she felt that if I couldn't keep her son happy, I couldn't keep my own son happy...what a biotch....

Remember this is one of the positive sides of divorce - your stbx gets his mother!!

Good luck and stay strong..