So 5 day before Christmas MIL announces that she wants us to host SIL and DN as well as herself and FIL next weekend. And implied that we are in the wrong for not inviting SIL in the first place. Bearing in mind we are seeing SIL and DN in two weeks time for DN's birthday and have never hosted them at Christmas, I am slightly bemused at this in the first place, never mind the late notice. I'm not unreasonable to think you don't invite overnight guests to someone else's house, am I? Never mind that we don't have enough beds, and I'll now have to arrange bedding, towels, extra food etc etc. Saying 'no' will cause reprisals, she's that kind of woman.