This year we spent Christmas day at home just the four of us (me, DH, DS and DD). We invited my MIL and FIL for Xmas dinner. They have two children (DH and SIL). Every year we have them over for Christmas. AIBU to think that SIL should invite them over for Christmas? She has never invited them to her house for Christmas in the 16 years I have known them. She always insists that she has Xmas day with her husband and kids at their house alone. Every year it falls to me and DH to have them over. I just want a Christmas at home with my little family, is that unreasonable? Is SIL being selfish?