YOu all will regret it if he excludes them from his life. They need to see the kids and their son/brother. And if you care about him and want to make sure you stay together you'll encourage it even if they hurt you because if he loses someone in his family he may end up blaming you. Been there, done that. Christmas? Not worth it, I understand that but don't let him give up his family. That destroys families and comes back to bite you and it continues on. When you teach kids to dislike someone, well, it carries on for generations.He is... I told him he could still go and I would stay home with the kids, but he was all "hell no!" He is not big on holidays or his family so it doesn't matter too much, I'm just amazed.
Also, my kids won't even be home on Christmas, so its not a huge deal to me, but their "christmas party" is tomorrow night.