Christmas is coming, would you spend it with a sister in law who gave you a headstone?

Personally I'd like to tell her to take a running jump, however in the interests of harmony in our household, would you put up with the in laws from hell all over christmas and up to and including new years or would you like me want a break from them and want new years to the wife, daughter and granddaughter. Is there a middle ground or should I resign myself to the week of hell?