"You don't mind if we watch. Will you do that again sometime so we can see it all?" Oh yes, I am so turned on right now" my sister added. "I love to w...tch you make love. We have got to do this some more!"I'd created a sex monster. My sister was going to want to fuck me all the time. I just hope she doesn't get jealous about me making love to Debbie, Denise and Samantha. I'm thinking I'd like to make our relationships permanent. I could marry any one of them and have an excuse to move all three. I lay over her knee feeling the fabric of her skirt under me. Lecture over Jenny gave me a hard spanking over my underpants. It hurt, but the scenario did turn me on. Satisfied that my bottom was well warmed up, Jenny ordered me up and pulled my pants down. She gave my cock a quick wank, then pulled her skirt up to reveal black stockings, suspenders, black satin knickers and plump creamy thighs. Over I went again, this time with my hard cock trapped between her legs. Jenny tapped my hard bare. In the heat of the moment, I opened her top slowly, twisting each button with my thumb and middle finger, and then running my finger along her breastbone before breaking the wet sensation on my lips to swiftly taking off her top.I reached over and touched my finger very delicately to the edge of one of her bra straps, near her collarbone, but instead of pushing it down and off her shoulder as she thought I would, I ran my finger slowly along the upper edge of her bra in front and then traced it. Trembling, Nena reached between her spread legs, positioning the fingers of her hands over the pink hood. She softly pulled up, exposing the sensitive button. It was obvious that although Nena was petrified with shame, a part of what was being done to her was feeding her libido. Her cunt was noticeably wetter and her clitoris was a deep pink and swollen stiff. She put her head down in shame, not able to make eye contact with anyone. As hard as she was trying to detach herself to what was being.