Debbie needs her step-Daddy.....18

Your stepdaughter Debbie had just turned eighteen when you married her mother, and you liked each other from the start. You doted on her, and spoiled her, as if she were your own daughter. She calls you 'Daddy'. To call you 'stepdaddy' just feels silly. Your wife is away on business, and it's a sultry, steamy, stormy night...