I would appreciate some advice on my SIL. She lives abroad (within EU) and has had mental health issue her entire adult life - bulimia, depressive episodes, and within the last 10 years or so, psychotic and manic episodes. She has apparently been diagnosed as bipolar, although nobody seems quite certain. She certainly has complex issues. She refuses to take medication for long, and therefore is never stable. She self-medicates with obscene amounts of Xanax. Nobody in the family can make her listen to reason. I actually think that they have all been conditioned over the years to accept her behaviour, and always make excuses for her.
Recently, her husband and son have said that they cannot live with her any more, and she has been staying with her mother, who she hates. She has been verbally, emotionally and sometimes physically abusive to her mother over the years, and this has now spiralled. She has also become extremely abusive towards my dh, who has been doing his best to protect his mother (from another country). I had enough, and asked her to stop, and now I have become the recipient of her abusive texts and emails. My father died by suicide a few years ago, and she has sent unforgiveable messages about how this is my fault, how I need to be sectioned as my children are unsafe, and on and on. My husband has told her to stop, but it is constant, and is starting to really take a toll on me. I've asked him to stop replying to her messages (I have) but he seems unable to.
Does anyone have any advice on how to deal with someone like this? I feel like the whole family is being destroyed.