It is unfortunate what happens to us when we age. Your story almost mirrors our parents, my mother in law fell last spring and broke her hip. At her age of 78 at that time surgery was very concerning and while she recovered and can walk again her hip still hurts getting into the car is a problem.
And my father in law has dementia and is very food focused. Sometimes he is completely gone and sometimes his mind clears and he can recognize us and speak about things from 40 years ago. But his short term memory is gone...
Wishing your mother a speedy recovery!
RE: Duty first before anything else.