Nightly, sweet giggles from ten-year-old identical twin sisters Ashely and Alexis Jenkins fill the air as they play on their birthday. A stump near the water's edge at their parents' vacation home on Lake Texoma gives the girls a place to stretch their imagination. A disease abruptly takes one twin, leaving the other gripped with survivor's guilt for the next ten years. But during this span of time, Alexis Jenkins believes her parents, and...