Thanks for the rec! :) Of my stories, I think It Changes Everything (http://irena-adler.livejournal.com/8800.html) would best fit the bill. In it, Colby finds out that David has slept with Charlie and is furious because he's been in love with Charlie for a while. So Colby tries to figure out how to approach Charlie, but fate intervenes in a big way when they're kidnapped together.