Shelley and Chief burst through the trees across the pasture. It was the end of a hot day of riding at the stables near our home in Tampa. My sister had gone out there with a friend and, as usual, she was one of the last to return. Shelley would turn fifteen that summer. She never took to softball or cheerleading; she was deeply in love with horses. Our divorced parents recognized this, and Chief—a deceivingly handsome bay with some quarter horse in him—was her prize.