My Daughter Is 52..she Has 3 Children 18,15and12. She Is

my daughter is 52..she has 3 children 18,15and12. she is divorced and lost custody of the children, her home and received no monitary support after court proceedures. She was homeless for about 3 years. She refused to move in with me or her Dad. She has seen psychiatrists for at least 20 years. She has seen many different psychiatric doctors collecting many different prescriptions. When I realized this I called several doctors, sharing names on the bottles found and they did an efficient job of setting up communications between themselves to protect her . She has been hospitalized in psychiatric units for a few days at a time. The longest period was about 2 weeks. Her Dad and I have rented an apt for her . She has been declared disabled and receives about $720. per month. Her husband who has the children wanted me to come ocassionly to be with them and I loved it. She had someone call me claiming to be a doctor, who said she may cause harm to herself if I visited the kids. He did not identify himself although he was very polite. I rea ly don't think he was a Doctor but I have not seen the kids since then- maybe 6 months ago. She is so rude to her husband,sibblings-4, parents and others. How can she be helped? I am truly at a loss.