oh that would be awesome, my mother had vascular dementia as a result of being a type diabetic for most of her life. She passed away six months after my father passed away. Every day she would ask where my father was. Every day we would have to tell and then watch her grieve all over again. So after a month of this I stopped, and would say he is out walking the dog or gone shopping.
So that would be a wonderful invention.
I feel for you with your aunt, it is a terrible thing and heartbreaking.