We are told that, if you're not confident, you should just "fake it til you make it."
This is great--in theory. In practice, sometimes "faking it" can have extremely real and terrible consequences, which these people found out the hardest of hard ways.
We've all seen the shocking scene in a romantic movie where someone, usually the brides ex, shows up at the wedding and objects. It's so common in movies and TV that it seems ridiculous, but how common is it in real life?