When your wife is excited about doing something it does not matter if you are sick. If you can stand you are going.
My wife was at the ALA conference this weekend and for two of the days I was supposed to go with her. On the morning of the first day I woke up feeling terrible, but i knew she was excited about me going with her so I sucked it up and went.
It was terrible. I felt so sick, but I did not want to ruin the day for her so I put on a stiff upper lip and she had a great time. She mentioned several times how much it meant to her for me to be there so my (semi)silent suffering definitely got noticed.