I don't say anything...I'm not a confrontational person. My mother was always very strict and you did NOT speak against her. And she could be extremely cruel if you didn't do what she wanted. I became quite the people pleaser because it wasn't worth it to disagree. Just the idea that I've upset someone will keep me up at night feeling guilty. So I just can't bring myself to stand up to my MIL. My husband says the best way to deal with her is just to nod and say yep, and then ignore it and do what you want.
Why didn't they just let you know that they wanted to come over and be a part of the festivities? I get that it's probably exciting to watch your grandchild on Christmas, but you just can't invite yourself over to someone else's home, or on their vacation, etc. I don't know where people get this notion that they are welcome anywhere. My best friend and I were planning a trip to WDW once, and I had posted something on my page about it or something? Like...I may have commented to her "I can't wait to see you in Disney" or something. But this girl we went to school with that we both avoid because she is a complainer and an oversharer and really obnoxious about it, saw the comment and says "That's so exciting that you'll be there. I'll have to see if I can use my disability check and get tickets. You guys can take turns pushing my wheelchair! Maybe I can share a room with one of you to make it cheaper." I was flabbergasted....neither of us had even mentioned the trip to her, much less invited her to go with us. My kids were going to be 2 and 4, and we were staying off property at a friend's house. So I told her sorry, but I was staying with a friend and couldn't invite someone to someone else's house, and my kids were too young, both my husband and I would be pushing strollers, and would not be able to push her wheelchair. The trip ended up not working out because my best friend's boss scheduled a mandatory work meeting in the middle of the trip, so it was a moot point, but I don't see how someone can feel comfortable inviting themselves. She did take the hint, but then she tried to guilt me into inviting her. "Oh...I understand....this is just a trip for you guys. I just thought it sounded like so much fun, and I never get to go anywhere because I'm disabled." and it went on and on, how hard her life is, and how she doesn't have many friends, and she just wanted to go on a vacation, and it's been so long since she's seen us, etc. Then my best friend ended up getting transferred to California and they were living in a hotel until they found a house and she actually told my best friend she was going to come live with her where she'd feel loved, and asked her to look up flights that she, my best friend, could afford....she wanted my best friend to pay her airfare so she could move in with her family because she wasn't happy where she was and didn't have the money herself. "Why don't you look up flights you can afford and let me know when I need to be there." That's some serious audacity. At least my in-laws aren't THAT bad.