John,
I'm sorry for that situation and for you and your wife, too!
My wife was living in the USA with our family and her father had to move to a hospital bed in their home and was unable to recognize anyone, including his wife and my wife on visits!! We lived with them for 8 months before I got hired with Merrill in Frankfurt trading commodities....The nurse came each day until he passed away!
My wife is terribly fearful that she will get Alzheimer's like her father did....I certainly hope not.
It was a difficult time for us all, so I hear ya! Steve 🙏