This is really scarey. What proof do you have of this or is it gossip. I hope you have something solid to provide to the court about the safety of your children. Isn't your ex a Dr.? I can't imagine him getting involved with someone like that. You are such a good mother and he is such a poor excuse for a father. Hopefully you can get supervised visits set up. I think it sounds like he is divorcing the kids also. Our thoughts and prayers go with you.