How sacrosanct is contact?

[changewhale]

My DH has eoweekend and he visits them in the week he doesn't have the weekend. He also has them 50/50 in the holidays. There have been three occasions in the 7+ years I have known him where I have asked if he could ask to rearrange as I felt he was needed for hospital appointments for either myself or our shared DC. He has refused. Am I being unreasonable to ask this? I worry about what would happen in an emergancy on a contact day. For context DH has picked up extra days when ex wife needed it for similar and less.

@Freefall212 FFS she isn't a child, he's capable of telling her "only in a really serious situation" and her listen.

Your whole way of thinking is frankly ridiculous. She's not asking him to prioritise her or their kids on those days for the hell of it, she's asking because that's when those important events are and they can't be moved. It is absolutely ridiculous to think it's more important he take a stance that he will NEVER, not even three times in seven years, slightly alter when he sees his older kids, for fear that he will lose all control and suddenly do it all the time, than it is that he be there for his wife and younger children at really crucial moments like life altering medical appointments.