Does she have family that visit? If not then perhaps just ask how she is coping around the house as you know her DH helped a lot? You could word it in a way that perhaps you are finding things harder these days. I don't think it's intrusive, if she shuts you down straight away I would leave it at that .
how are schools handling students who memorize books but can't actually decode
What was your favourite board game as a child?
Churchill to be axed from British banknotes in the name of diversity.


