One summer evening during a violent thunderstorm a mother was tucking her small boy into bed. She was about to turn off the light when he asked with a tremor in his voice he said, "Mommy, will you sleep with me tonight?" The mother smiled and gave him a reassuring hug. "I can't dear", she said. "I have to sleep in Daddy's room". A long silence was broken at last by his shaking little voice: "The big sissy."