As I've written before, Evangelina, our housekeeper, and I invariably began our day together leaning against the counter to chat while we drank a cafecito. This day was special. Never was Evangelina's highly refined sense of play more evident than as she began describing rebozos, "Our rebozos are our third hand; whatever we need to do, our rebozos help us with our work." What is a rebozo? Rebozos are shawls worn by Mexican women of all social classes, but especially by women from the…