My brother in law (husband's brother) has had a coke addiction for the last decade. Last year he admitted it to us but failed to get help. He is a complete narcissist and even without the drugs, is an aggressive bully. He lies a lot and basically told us he was absolutely fine now. He's borrowed (and stolen!) lots of money from his elderly mum. We have little to do with him now though initially we were supportive of him getting help. We kinda gave up.
His ex (my nephew's mum) we speak to regularly and is a lovely, lovely person. However, she is so scared of my brother in law she allows my nephew, aged 13 to see him. It's a weird situation where she wants him to be a good dad so much that she almost views his parenting through rose tinted spectacles. For example, she ignores him letting my nephew stay up all night watching inappropriate films making him late for school because he took him to a football match at the weekend. Recently though, she has admitted that his behaviour has been more aggressive (he got into a fight whilst my nephew was there) she also worrys that he drives whilst high. There are lots of other safeguarding issues and I worry where it will all end. I've said we will support her if she wants to get a court order in place for restricted access- though I don't know if she can do this? She acts like she is powerless.
The other problem is the rest of the family dont really want to know- including his mum and even my husband to an extent.
Any advice? Is there anything I can do?