I hate to state the obvious, but you've both changed. In your case, it was for the better. As far as your XW is concerned, you've moved on, so it doesn't really matter, unless, like you said, it affects the kidlets.
All week I've been hearing stories about how the holidays stir up emotions. Perhaps your friend is expressing that she misses the memories of holidays past? She misses her 'old' friend?
Or not.
Merry Christmas Kerry.