My ex says he will not have our 2 year old for a week in September to allow me to take my older son to Disney world in Florida. When the trip was booked we were still together so it was going to be a family holiday. My older son was so excited and I didn’t want to let him down so I want to go alone with him. I don’t think I could manage him and the 2 year old on my own and I have no one who can come with me so I asked the ex if he would have our son to allow me to still go and he said no and that he will make sure I can’t go without the 2 year old as he thinks it’s not fair on our son. Can he do this? We have 50:50 parental responsibility. I don’t have anyone else who could have the two year old that week. My reasoning was that he’s too young to understand and can’t go on most rides anyway but I would take him on his own when he is old enough. Ex still says no and that I can’t go unless I take both kids. What am I to do?