Yeah. Can't really comment. Definitely seems like a bizarre situation and really an odd thing for the wife to die from.
They haven't been public in a long time.
If it makes sense to the family then it's probably the end of it.
I could completely see a situation where she was the caregiver and passed and a 94 year old with Alzheimer's is confused and aimless for a week before passing as well.
Even that age without Alzheimer's can be tough.
That's the age my grandmother was when she passed and a guys bulk of the time she had no idea who all these people were in her house - very friendly and polite about it and things would register on occasion, but definitely a slide over her last 6-8 months. One morning she thought my uncle (her son) and I were rival coffee salesmen, once he left the room she leans in and discreetly asks if we got along ok or if there was some professional friction. I could completely see her not knowing how to do our handle situations that would have been obvious even a year earlier