This niece fell victim to one of the classic blunders… The most famous is: Never get involved in a land war in Asia. But only slightly less well-known is this: Never wear white to a wedding! (…or go in against a Sicilian when death is on the line.) It's always surprising to see stories about people wearing white to a wedding; you would think that people would know (and obey) such a universal rule. Your job at a wedding is to blend into the crowd. There's nothing else that you need to do other t…