H came over supposedly for a cake of S2's b-day with a gift.
We opened the gifts together, and he walked the dog while kids ate dinner. I was about to take out the cake when he came back, and he said he has to go. D3 asked him if he wants to eat the cake, and he said yeah maybe tomorrow. He stayed barely for an hour.

So I guess he must have gone somewhere with OW for Thanksgiving dinner. I don't know if it's her family or maybe friends. I don't know what kind of family is ok with their daughter bringing a married man with little kids to their holiday dinner.
It stinks. It hurts that holiday with her is more important to him than his son's birthday.

But I don't think I will even mention Christmas to him anymore. I thought he wanted to be included in kids' lives, but I guess not.
Tomorrow SIL invited us for a get together, I don't think H is coming, so I'm hoping to have a better day.