Hello Mother in Law
Welcome to bpdfamily.com. I'm sorry things with your dil have been so difficult for you. We all understand here what a struggle it can be to watch someone we love struggle themselves. Going through a divorce is hard for anyone, add in children and then BPD it can be devastating. Understanding more about BPD can help.
Video-What is Borderline Personality Disorder?Our boundaries are not rules we can expect others to live by. Our boundaries are about values we live by and they play a role in our reactions, we can only control ourselves. You won't be able to control what your dil says to other people about you, you can however control how you react. I know how painful it is to hear someone has said things about you that aren't true.
Video-Tools to Reduce Conflict with a person suffering from BPD It sounds as though your grand daughter is struggling with this situation as well. Divorce is usually hard on children. Being someone who offers her some stability will benefit her a great deal. She is lucky to have you. Your son will need to be the one who deals with the decisions made in mediation about the children, you are part of his emotional support through this.
I'm glad you have found us and am looking forward to hearing more of your story. Keep posting, it helps.