Of course, we want our friends' weddings to be joyful and stress-free, but the reality of the matter is there's always something unexpected. Most of the time, it's minor and something everyone can laugh at in the moment or a few weeks down the road. However, every so often, some revelatory piece of information is uncovered that becomes a point of no return for the couple. Luckily, I have yet to witness this kind of madness occur at a friend's wedding. However, last year, I had the great fortune…