On Friday MIL asked what weekend worked for Christmas. I told her what week I'm supposed to deliver, but there is a small possibility it could be the week before. I told her I'd try to firm up at my next appt. In 5 days she has sent me 2 texts, an email, and called me asking what weekend would work.
Finally I told her to plan it. Worst case DH goes without me and I skype in.