Not unreasonable. But I do think everyone is entitled to their feelings here. As mothers we put our children first. Our partners often take the role of putting us first because no one else does so he's probably pining for you more than anything and wants you to enjoy it as well as the rest of the family. My DH would be equally difficult let me tell you especially if we were making first time memories. So try not to be too annoyed, but don't feel bad for not going. On the other foot. If you are concerned get some medical advice.