I'm attending a friend's costume party wedding, and was planning to borrow costumes from a coworker (H and I are not that into halloween and didn't feel like spending time/money planning outfits we'd never use again). My coworker brought me a cleopatra outfit and some matching guy cosutme. The cleopatra gown is bright shiny satiny WHITE. Crap. I'm close with the B&G and would never want to offend or upset, but are costume weddings an exception? I've been told that she'll be keeping her white gown on for both the ceremony and reception. What would you do?