"something suddenly came up." (any Brady Bunch fans out there?)
I think you should go, since you told him you would. Maybe you can cut it short for something fun like, "I'm sorry, I only have 1hr, because I have a skydiving class to go to."
Me 36 Husband 35 D5 S2 separated: 10/29/07-present Served divorce papers 1/22/09 "When the world gives out beneath your feet, it is time to learn how to fly."