Sorry for your loss mate. Same thing with my mother. It’s even harder for the partner of 50 odd years watching them deteriorate and nothing they can do about it. My mother had it that bad, I can remember painting the bathroom for her and dad, and my mum came in and said to me “What the hell are you doing” and also added, “ haven’t you got your own place to go to”,and told me to get my stuff and bugger off and she also said “ when you go, take her with you” meaning my wife and kids. We were staying over at the time.Mum was that bad we had to put her in a home because she was impossible to control. She would also have a full on argument with herself in the mirror. True story mate. It’s almost cruel. All we can do is take care of ourselves best we can and it starts with what we eat and drink. Sorry for your loss mate, no one deserves that ****.