Poor guy..... *Vid*

Man, if your going to do something like that you better be absolutley sure she'll say yes! Could be she was just so embarressed that she said no to get out of there.
I think Pronto is right, but I hope you are wrong, Pronto.
Here is why: If she wants to say yes and embarrasement caused her to say no, she may say yes later on in a more controlled atmosphere.
Then the rest of their marriage will always have that moment in front of thousands of people.
In such a case, even if you want to say no, common courtesy demands you say yes.