Melúsine: Sympathy! Breathe in, breathe out. Each breath brings you nearer the end of your time there. Then you will be able to go home,go in your room and close the door, make a cup of tea and read your book in peace, with nobody nattering at you or asking intrusive questions.
Sometimes I think I'm incredibly lucky that out of my hundreds of relatives there are only three I heartily dislike, and a couple more about whom I am neutral. It must be very hard to not get on with your family.