I'm hoping someone else will be there, but that is by no means a certainty. If not I'm trying to think of an excuse not to go. I really don't think I can face it!My mother is near same age, I don't do Xmas with her as it's such a minefield but visit at other times.She has plenty of friends.
99.9% is too high to allow you to do this, surely? It's not a risk, it's a certainty! Unless you have someone who will go with you? Or unless you can give up any thoughts of your own needs for the time required, and variously praise, listen to, and prioritise your mother? I find this possible if I know the time I can leave, and as you say, bearing in mind they are frailer and so on.
Next year you could make plans to be elsewhere before your brother can!
Re meltdown, yes I nowadays mostly avoid situations that will cause these, though the unexpected can trip me up, then I tend to try to escape asap, and without having been rude... best strategy.
It's not that Christmas is a particularly bad time, it's always a bad time. I stay away as much as possible. Even a phone call is a minefield.
