DH is autistic, highly functioning but does not do any sort of organising very well.
I used to do all the planning around Christmas so we saw his family and mine.
After 10 years of his family being cold and unfriendly towards me, I saw the light and stopped organising meet ups. I made it clear to DH that I wouldn't be organising anything with regards to his family, but I would go with him/support him if he asked.
Inevitably he's not organised anything and hasn't seen them since. MIL has been asking him what his plans are for Christmas and he just says "I don't know."
She will be on her own, we have no space to host her at ours and I am not willing to drive there (2 hours) as I have been working 10 hour shifts the past 2 weeks and today (Christmas Day) is my first day off. I want to stay in my PJs and relax.
AIBU to have left him to it, knowing this would likely mean MIL is alone?