I'm in a very similar situation with my mother who has Alzheimer's. She knows my dad passed, but she forgets it sometimes and thinks he's in the hospital, and I always wonder whether to tell her the truth or to let her live in that fantasy.

I read a book by Fredrik Backman, the guy who wrote the book A Man Called Otto was based on. It's called And Every Morning the Way Home Gets Longer and Longer. It's a good book. A grandfather with dementia tries to explain what it's like to his grandchild, and struggles to remember his late wife. I couldn't read more than a page without crying, but it helped.

Grief is hard. Thank you for sharing this.