Well, guess it's kind of late......but I suspect your W will have her family meet in your sister's cabin, regardless of your feelings. If so, then it will be up to you to decide to join or not. If she goes through with it, then you might consider telling her that you will not be attending anything else where you have to play happy family with her. That draws a line in the sand.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!
