I'm sorry Christmas is turning into a source of conflict, and I can understand why you don't want your H to sleep at the house this year.
Did you mention your boundary about your H not sleeping at the house to your kids and your H before you sent them off to discuss how they wanted to handle Christmas? I don't have a single family member who would take well to being told to make a decision and then having that decision overruled because of a criterion that wasn't communicated initially.
Me: 44 H: 44 Kids: 20, 16, 16, and 10 Together/Married: 22 years H announced he was emotionally detached and considering D: 4/4/16 H announced he is going to try to stay and reconnect: 5/1/16