My father-in-law is ill, so please ask my mother-in-law to take care of him.

My father-in-law is ill and let my mother-in-law take care of him. According to relevant data, it is human nature for family members to care about each other. It is human nature to ask my mother-in-law to take care of my father-in-law when he is ill. The younger generation can't help him in taking care of him, but they can give him material support.