I often think with relatives and friends its best to go back to my grandmothers rule of having a set time for the visit. She would say "come to tea on sunday from 2-4 pm" and she meant it! Visiters, no matter how dear to her, were not allowed to outstay their welcome or her ability to cope with them.
At 4pm the clock would chime and she would say. "Ah, four oclock already. Time for my nap. Thank you for your visit. I will get your coat." And she did!
We never thought it rude because they were her rules and we knew them in advance.
Is it rude to not finish a book club choice that was selected by someone else?

