My In laws have NEVER celebrated holidays. All the sudden when my husband joins my family and starts having holidays with us she tells his he needs to stay over there with them and I need to stay with my parents, because it's important for him to spend Christmas with his family. She DOES NOT believe in Christmas and says she doesn't care if he wants to celebrate it but she doesn't and won't so why does he need to be with her if they literally don't do anything? At all.