Cinders, my heart goes out to you on having to deal with what should be a non-issue.
I still haven't been challenged with the holiday issue since my W isn't close with her mom. Her mom has a tendency to do something else on the holidays anyway since she is the master guilt manipulator in our lives.
I said to my W ahead of time about the holidays that I want to make sure that the kids see her because it is important to them and to me. She ended up saying that she can come over Christmas morning before my sister and BIL get there (they are not understanding about my W leaving). She is fine with my mom being there because my mom still loves her and is very patient about the situation.
I am not trying to make you angry at the OW but I strongly feel that she is manipulating your H to go overboard in his having the children on the holidays and to include her as the faux mom to the children. Her self esteem and controlling issues will eventually come back to haunt her. And your H will remember how strong but fair, kind and loving you have been.
The OW is a very, very sad and tragic person. She will never be happy because she can only cause discord for others. I know I don't know her but anyone who can be fine with being with a married person and seek to intervene in family issues, specifically children are very selfish.
Hugs coming your way, Cinders!
mmf
Me:56, W:51 D:26,S:24,S:22 Married:18 Bomb 9/27/06 Separated 11/27/06 Divorced 10/6/08 Leaving it up to God