My SIL has a drinking problem. She is a nasty,bitter drunk and reserves all her vitriol for my db.(who is not blameless)She also hides it well. He has searched the house for bottles-recycling- no evidence. And she goes quickly. I've been with her and shes been fine, goes to the loo and is smashed. I also worry theres some cognitive issues as she repeats herself all the time. Shr gets falling down drunk.But shes in denial. Says she only has a couple of glasses to cope with stress. Doesn't drink spirits. My niece wont just call in with the kids because shes not sure what state she'll be in. She works, but is finishing(her choice)next week and we are all worried she'll just drink all the time. Her and db look on the verge of splitting(for other reasons)but again he thinks she'll drink herself to death if shes alone. We know we can't do much until she admits she hs a problem, but how can we do that? There has been robust conversations where they have said "look, youre drunk again. It got to stop" and she still denies it. How can we get through to her?