This sounds like it's on your sister. If the plan was my mom and sister and family coming over, I would not allow my MIL to disinvited them. Luckily you've got enough folks to have a great time regardless. So go do that and enjoy your Christmas!
Sounds like they are rotating them so they aren't so overwhelmed. Maybe the SIL had a anxiety attack and they had to find an alternative plan. Get out of your feelings.Anonymous wrote:They aren't sticking to immediate family. OPs sister had invited in laws and her own family. Then changed plans at the last minute and told her own family not to come until late afternoon.
I likely would just tell her never mind and not go at all, to be honest.