Hi, my ex son in law was an abusive arsehole while he was living with my daughter, he ate the kids packed lunch stuff, hit my daughter, banished the kids to their rooms all the time, threatened to punch me the first time I met him, is a gambling addict, never contributed anything financially or otherwise, now lives in his mum's in his old bedroom aged approaching 40, turns up at my DDs house when she's at work, tells the kids [only one is his biological child] that mum doesn't care about them and that's why she goes to work, tells them and my DD about the [alleged] women he's f**king, tells my DD she's a mug for going to GA now that she is free of his influence [re gambling anyway]. What can she do to stop him turning up? The kids let hm in because they've forgotten about his violence, about him smashing up the x-box and tv, about his general abuse. I live hundreds of miles away or I'd be there guarding the door, guarding my family more than I can be. He pays no maintenance, why would he? He's never contributed anything, my DD worked full time to be able to afford everything including his gambling habit and then sadly hers, while he lay on the sofa getting fatter and lazier. She's a good mum, she deserves a good life and so do my GC but none of them are going to have one while this useless tosser is hanging around. I have no AIBU question but this looks the busiest bit if I want answers. Help.