Yes. And she also cannot imagine what it is like for you. Her world has narrowed down so that she cannot see other peoples problems.Since not recognising me as her husband I suppose I’m a just a nice man with a problem.
When our cat got cancer and had to be put down I came back from the vet and bawled my eyes out. OH said nothing and just watched me. When I had finished he said "what are we having for dinner?". Thats it, you see - they are unable to imagine what it is like for other people and can only see their own needs.
You have got to let go of the person they were in order to cope.
Think about what your line in the sand is.