My DSis has just got engaged for the second time to her abusive partner. In the past 2 years they have broken up and got back together numerous times because of his controlling emotional abusive behaviour. They were due to marry last year but he left her (along with all the debt from the cancelled wedding). During their time together he has strangled her, pushed her, punched her and stamped on her face knocking her front tooth out. He had also belittled her calling her a slag and a whore if she glances in the direction of another man when she is out. When she left him 6 months ago I really thought it was for the last time but now I find out they are back together and got engaged last week. She swears he had changed but I can't forgive her did the hurt and upheaval he has caused. I worry so much about my niece and nephews and I don't know what to do for the best.
Am I wrong is it possible he has changed? I want to be happy for her but I just feel like it's a times