He was abusive (emotionally and sometimes physically) throughout our marriage. He's overweight, not very attractive, and just an all round twat. We've been divorced for over 8 years (my decision) and this is absolutely not a jealous ex wife post.
He's had a few girlfriends over the years but none have stuck around for more than 6 months. Current one has lasted a year. She's 10 years younger, slim, attractive and according to DD a lovely lady (he hasn't introduced me to her). Her kids apparently hate him and are terrified of him moving in. Although I've never met her I feel some responsibility towards her. I wouldn't interfere but I worry that he's going to move himself in and ruin her life. AIBU?