You have it backwards. Her husband is caring for her and she is unselfish enough to understand and appreciate his dedicated unselfishness.
Ahh ok. Yes we should be grateful for our caregivers. My sister and mother were God sends during my leukemia.
I think at one point or another most all of us have been caregivers to someone.
Regarding this woman - The difference here is this was her very young daughter (not a full grown adult) and she left about 4 months after her diagnosis. It hadn’t even been that long.