I am almost 64, and have a 29 year old daughter who has always been difficult but after a falling out in 2016, when my husband threw her out of our house, after I asked him to speak to her about her attitude, she has been very distant with me, didn't speak to me at all for over a year, and has recently upset me again by being nasty to me! I already suffered from depression, which after what happened in 2016, became so severe because of the issues with my daughter, that I required hospital admission in September 2019! I remain traumatized by that, and it has damaged my relationship with my husband and my GP!
My husband just cannot see why I let her attitude get to me, but then he has always been the favoured parent, whereas I have never felt as if I could reach my daughter! My 26 year old son, to whom I have always been close, and who still lives at home, says that his sister isn't going to change, and I should keep her at a distance. He has been doing it for years! I know his advice is sound, but it breaks my heart not to have a good relationship with both my kids! I am an only child and I lost my own mum to cancer in 1997, when she was younger than I am now. She was my best friend and I miss her every single day!
I am presently taking my son's advice, for my own sanity, but finding it very hard!
So I think that it would be in your own interests to distance yourself from your daughter, but I can understand how hard this might be for you. You have my utmost sympathy! xx