Full sympathies OP, my mum is an alcoholic and I sway between:
1 liking her and wanting to spend time her.
2 wanting her to get drunk and fall asleep so she's not so vile
3 wanting to lock her in one of the outbuildings (farm)
4 hoping that she will choke to death on her own vomit
that's how much she has ruined and continues to ruin my life. My dad on the other hand is fucking awesome and if it wasn't for him, I wouldn't see that bitch ever again.
As pps have said, you can try talking to her, if she is in denial though as my mother is, it will have no impact at all.
I'm not sure how young DCs would see it from their innocent viewpoint, tbh, knowing the continuing (I'm 33) effect it has on me from when she first started, I wouldn't want her to perform in front of children.
Uninvite, she'll think you're a cunt anyway if you don't feed her alcohol so you might as well have her think you a cunt and not have to deal with it whilst sh ruins your Christmas.
just spent the weekend with my mother and slightly raw sorry for hijack