It’s sad, but it is not sick.
This lady has refused many very credible offers of assistance, probably because that would change her routine.
If she has some level of alzheimers (not out of the question at her age), she would still need to accept a representative acting as her advocate. The fact of her age does not in and of itself mandate ongoing accommodation from the property owner. I say that as someone who has rented out rooms to others on a small, private scale.
Is there a law that prohibits one from getting evicted near ones birthday?