He had reached around me and was very gently pinching my nipples while he kissed my ears and neck. Only the anticipated pain kept it from being been r...al nice. Instead, nothing happened. We just stayed there on our knees, him against me, with the head of his cock gently nudging me and exploring my crack. The natural movement of our rubbing together caused some pressure down there, but that was it. Actually, it was comfortable. Sheila had released her grip on me and just laid my head on her. Atfer I closed the door I stripped out of my clothes and went and laid on the couch. I spread my legs as far as they could go and slowly started the trek down to my pussy. I started out by playing with my nipples. I rolled them between my thumb and forefinger and then pulled them taught and released them. I repeated this until they were hard and sticking out. I then slowly glided my fingertips up and down my torso, enjoying my feather light touch and the gentle waves of pleasure rolling through. A couple of days later my parents were gone and Kay took charge, not that I minded much, with her in charge I had a hell of a lot more freedom than I usually did and I spent most of it plotting ways of seeing my sister in the buff.A week passed and I was beginning to think that I would fail to meet the challenge, I so rarely failed that I felt depressed and one evening I snuck a few snorts from dad's scotch."What are you doing?" Kay asked making me jump.Guiltily I put the scotch bottle down and. I kept on driving for a few more miles and she said do you mind stopping whenever you can, I really need to pee. I said I would pull over at the next exit and she said ok. When I came to the next exit I pulled off and went into a gas station and she got out and went to the ladies room. She was gone about 5 minutes or so and when she came out I noticed that she was no longer wearing a bra. She got back in the car and we continued on. This made it even harder to keep my eyes off of her and she.