Wow, SmallButMighty! In reading your post, I just realized I don't remember a Christmas Eve in at least the last 15 years when Santa Claus wasn't passed out. Amazing what I have accepted as normal.
That said, I suppose this will be another "normal" holiday. AH up until now has managed himself in front of extended family, and I have no reason to think that he won't again this year. Although the drama leading up to it is expected. The threats to not participate, cancel it, the "your family" statements, etc. I guess that's another "normal".
Fortunately, I love the holidays - the smells, the sounds, spending time with family, the decorations, the hectic schedules, and the overall excitement. I look forward to this time of year. Although for some reason the past few years "The Little Drummer Boy" song brings me to tears. Still trying to figure that one out, but I'm pretty sure it's something about the hopefulness.