My middle adult dd and her ds age 6 came back to live with us 3 weeks ago after housesharing went wrong. My dd has had a rough few years getting pregnant as a young adult then going through social services to fight to keep ds when it was found that the father of ds had been abusing him. Anyway over the years we have supported them both, almost bringing up dgs. Hes had serious mental health issues and has really only just started to settle down at school. Dd has had her own flat and a good steady job in a good career though always keeping her party girl status. So we found out that she's a frequent cocaine user. This explains how she has been since they moved home. She 'nips' out late evening to see friends then rocks home early hours usually 3am but has been 6 and 7 am. Shes super skinny and hardly eats but sleeps and sleeps which is then causing her to be late starting work (she wfh). My dgs gets neglected in the sense that she doesn't feed him until she's awake which can be 11/12 pm and she hasn't made him a proper meal or bathed him since they've been here. This apparently was what life was like for dgs when they lived away from here. I do look after him and feed and nurture him and have now stepped right in as his main care giver. When he was 10 months old my dh and me were approved as Foster carers for him when it looked like family court might want him to stay with us. Ok so I haven't enabled a AIBU as doing this on my phone while I have 5 mines alone. She denies flat out and is practically laughing at how stupid we are but we have solid evidence and witnesses that she was taking it in where she lived before while my dgs was upstairs. I want her out of my house. I have a teenager too who is really anxious anyway due to all we've been through with middle dd over the years and now this. Please please can someone help me. We have a great support network of friends and family so we aren't alone and we will seek help. I'm terrified of SS getting involved again. Dgs is absolutely loved and well cared for with us. Please someone help.