I heard Paul's car pull up to the driveway just as I finished putting on my pants. I looked around guiltily for any signs that his girlfriend had just given me a blowjob. My palms started to sweat as I walked to the front door. As the door opened I was prepared to blurt out the truth--Your girlfriend just gave me a blowjob!--when in walks my sister Stacy, with her friend Madison close behind. "Surprise!" Stacy yelled, ste...