NOW”I was stunned that my sister was asking such a thing but I really had no choice. So I took my right hand and started stroking my soft penis. S...e was standing by my feet so she had a full view of me and I had a full view of her in her white skirt and tight blouse. It didn’t take long before my cock was fully erect and I started stroking it trying not to look at my sister. I tried to forget she was in the room but no matter how hard I tried I knew she was there, staring at my tiny penis. “Hmmmmm, yes you are!” the young woman responds as she quickly drops to her knees. Soon she draws her tongue from just above the knee all the way up her inner thigh, taking in her clear nectar as she goes. Before reaching Katie’s glistening folds she pulls at her wrist and removes her fingers. The sound my wife makes as her pussy is painted by Rachel’s skilled tongue is to die for. “Ohmygawd!!!” she hisses as she experiences another woman for the first time. It’s just an appetizer as Rachel. ”“Maybe I need to trade you in for this year’s model, Kevin. You’re the old model, a broken down comedian.”I guess we really are an “item” now. Denise and I are talking much the same way Mom and Dad would crack their private jokes together. God, do I ever miss them so much!We pulled into the parking lot and wriggled out of our outer clothes in the car, locked them in the trunk, and dashed for the school. When we reached the doors we were soaked, but with what we were wearing, it didn’t matter. He is never there on Saturdays. We recline facing each other. Our towels d****d to the sides and our junk in full view of each other. We lazily masturbate. The professor jokingly asks if my ass is still full of his cum from the previous night. After 10 minutes or so of slow masturbating the professor tells me that he is still horny and asks if I would be interested in going back to his place for another round of sex. I sit there considering his offer. He adds that he would like me to.