One summer evening during a violent thunderstorm a mother was tucking her small boy into bed. She was about to turn off thelight when he asked with a tremor in his voice, "Mommy, willyou 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 shaky little voice:"The big sissy."