My MiL is 88, and lives in large house in a remote area. Two months ago, my FiL was admitted to hospital with a serious illness. He is recovering, but it will be some time before he returns home.
When FiL was admitted to hospital, my DH went to stay with his mother (my MiL). I do not live with my DH, although we are still married. The reason why we live separately is because DH's behaviour can be challenging and this is not good for our 19 year old son who lives with me and has MH issues. We also have a 21 year old son who has serious MH issues and lives in supported accommodation.
MiL can be very controlling, and the onset of dementia has made her need to control even more profound. DH has Asperger syndrome and MH issues and finds it difficult to regulate his emotions. Over the weeks, I have received daily, tearful calls from MiL about my DH's behaviour towards her (shouting, swearing, threatening). I know from experience that this is exactly how he behaves under stress. I have also seen DH daily (away from our son) where he rants about his mother's behaviour (insisting he stays at her home until noon and comes back at 4 pm; following him around and shouting at him). I know his account of this behaviour is also true, and that it is made worse by the strange power dynamic between DH and his mother.
Two days ago, my DH walked out and returned to his lodgings. His mother is very upset and furious. I have been to see MiL and she is coping with help from her niece, who visits regularly. I can also drop things off for her and make sure she is OK, although work and care commitments and the fact that I do not drive, limit the amount of support can give.
I feel my DH has done the right thing by leaving his mother's house. However, his mother insists that he has been selfish and cruel by leaving his mother alone at her time of need. Yet, when they live together, the relationship is one of irrational control and abuse.
AIBU to insist to my MiL that her son is really not capable of caring for her and that their relationship is much more positive when they do not live together or is there no way MiL will ever accept this?