Let's see now:
My sales meeting is in Hawaii this year. In the past I've taken my wife to other exotic locales and she is hung around the hotel pool while I've been in meetings.
How do I tell my wife I don't want her to go  this year because I'm afraid that she'll get hopped- up on Maui wowie at a luau and say something inappropriate or embarrass me? 
 … Sounds pretty awful when you frame it like that doesn't it. This woman is putting her loyalty to her company ahead of her loyalty to her husband. Wrong wrong wrong. And I'm surprised the ethics advisor instructed her to have him stay home.