Please don't go. Think of your DIL - 2 little uns, the stressiest time of year for her husband, she is very preggers and possibly dreading the fact she has to 'make Christmas wonderful' for the children and her husband during the little time he has off (when he would rather be vegging out anyway) - and then MIL turns up and expects a family love in... - Have I said enough.
How do you acknowledge Easter.