My ex of 7 months isn’t willing to come for Christmas Day as he’d previously said he would. He’s saying no as it’s not appropriate but I rather feel it has to do with his girlfriend of 6 months who he has unbelievable bought a house with. He had said he’d only pop in with some presents but our children would really like him to come for the day. We have always been mostly amicable. I feel he is choosing the new girlfriend over his children. Am I being unreasonable?