Kate whispered that she hoped I didn’t mind, and I said “god no”, she was hot and I was turned on. After a few minutes her hand moved to my leg ...and starting rubbing it, I looked toward Mary and was surprised to see her kissing John, his hand up her top feeling her tits. Kate whispered “hope you are OK with this”, and I turned and kissed her to show her I was. This was fucking great with all my ideas of turning Mary into a slut and a swinger coming true.My hands were busy taking of her clothes. My brain should have warned me, but like a fool I volunteered, I live in an apartment just down the street. Then we stumbled down the empty dark street, up the three long flight of stairs, and into my apartment. The place was a mess between the broken lamp still in shards where Id thrown it during the fight Id had with my girlfriend earlier that day, so only half the normal light came on when I flipped the switch. I showed her the couch, then walked into my bedroom crashed onto the bed. The. "Let me fuck your tits," I said. She stopped fighting. I threw one leg over her chest then rubbed my cock in between her tits. "Push them together around my cock," I said. She looked disgusted but squeezed her tits around my shaft. I began to rock my hips back and forward trying not to moan and alert her father. I began to thrust harder and harder my cock growing and reaching ever closer to her face. "Open your mouth," I said. She opened her mouth. I took my cock out from between her tits and. That was particularly hard on Donna, but I had a couple of things to say that should cheer her up: "Donna, I heard Carol and Julia talking about having a week-long girls' shopping trip to Italy, going in the plane when Vanessa and Prof go. Don't tell them I told you, but I think they're intending to invite you along on..." WHEEE!"Vanessa yelled, "Don't disturb their studies," but she was WAY too slow; Donna was already out of the door and sprinting for the Kids' House. Donna may have gained.