When I was a senior in high school my mom quickly fell in love with a man and married him. We all had a bad feeling about him but she went ahead ahead and married him. As soon as we moved into the house he changed and was physically, emotionally, financially abusive towards her. A couple years later she had to dip into her retirement to leave him and they divorced. For a couple years now she has been seeing him secretly and while it’s known they’re seeing each other again she has never come out to say it. I ran into them at a restaurant today and it was the confirmation needed. I realize that I can’t change my mothers choices. I do know she will probably move back in with him when my brother graduates high school this year. I am absolutely devastated. I am angry, sad, and scared. I need advice on boundaries as I don’t want myself, fiancé, or future children to ever be around him.