There is no rule book. If this is working for your family, then it is right for you. Your gf sounds insecure and jealous and that’s why she is trying to put a stop to your joined holidays. She’s going to have to come to the joined celebrations and put on a happy face or I doubt you and her will work out. If she is the reason for you stopping the tradition you have done for the past several years, your children will resent her.

Once your kids are older, this tradition will probably come to an end. But who knows? Maybe it can continue on. I think it’s lovely!