You are NOT wrong. You are his new nuclear family.
This is a tricky one because you don’t want to go and he does - it’s Christmas Eve, there’s a party which it’s understandable he wants to go to. I say if he wants to go let him, yes you can be upset about it but you can still enjoy Xmas Eve with your son? If he stays because you’re not happy about him going it might lead to resentment which won’t be fun either. Let him make his own decisions? I don’t agree that he’s wrong for wanting to go to a family party, isn’t that very normal?
I think you should let him go x
How old was your son last Christmas? Baby wearing prevented him from being passed around but also prevented him from building bonds with his family and them building bonds with him. I find it odd behaviour. My son was 6 weeks old at his first Christmas, and he spent most of the time asleep in his pram, but people could go have a look at him. I wouldn't stop my family from loving on him. Especially if they had their jabs, weren't sick, washed their hands, and didn't kiss him. Your feelings are valid, but so are your partners. Would your partner take your son? You can have a relaxing Christmas Eve, give yourself a break, have a home spa day etc
@Felicia, his parents are also his family. That doesn't just stop. He will be spending Christmas day with his wife and son and Christmas Eve with his family. Most everyone splits the holiday with their families, it's perfectly normal and acceptable.
@Hannah his family are making fun of her and not respecting her boundaries, obviously she doesn’t want to be there. She accepted to go see them which is more than they deserve for that attitude. His parents are his family but it’s ridiculous to leave your son and wife at home because of a party.
@Felicia, I'd like to know how the husband feels about this because in the post, everything about the son is me, my, I. I need more info. However, they disrespected her, yes. Therefore, she has chosen not to go, completely valid. If he still wants to go, that's also completely valid. He should absolutely say something to his family, but I would like to know where he stands on this. Also, it's not just "a party", it's the time he'll see his family for Christmas.
You are definitely not wrong, Christmas is a family holiday and you and your son are his family, if he decides to run to mommy and daddy for a party he is wrong. If I was you I would plan something really fun with your boy, maybe some games and some cute outfits, take a bunch of good pictures with you and him and frame one or two. Let him realise what it means not being with you.