Aunt Shari screamed as if in pain. I had heard about dog's cock becoming huge when they cum. Given Buster's huge cock his knot must have been at least...as big as softball.Aunt Shari's open mouth was drooling. Her eyes were half closed. In an hour of fucking Buster had turned aunt Shari as limp as grandpa and uncle had done to Libby and me. Buster kept his firm clasp on aunt's chest as his body shuddered with his knot buried inside aunt Shari's cunt.Aunt Shari wailed as each fresh orgasm tore. He pushed me on the bed and started licking my pussy. He prepared my pussy well to take his monster. When he was convinced that it was wet enough, he inserted his fully grown dick inside me. Again it wasn’t easy, but I did much better this time.We started fucking again, and this time, he didn’t cum that easily. He kept fucking me for half an hour before he finally cummed. Meanwhile, I lost the count of my orgasms. It was that good!After he was done, he wore his clothes and left the room. I was. I guess when a human, male or female, gets into this mood, there is nothing anyone can do to stop, or so I thought, because as I humped the gear stick, feeling the hard knob slide in and out, letting my mind build up to its apex, there was a gentle knocking on my rear passenger seat window.I froze and immediately saw a movement in my passenger side mirror, a guy was watching me, and wanking himself to my unusual sexual behaviour.I dismounted the shift stick, but slid into the passenger seat,. With the worry to disappoint him my wife had agreed on one night out. Later that evening my wife 'Raquel' ran the idea and plan bye me. I totally disagreed with the hole thing. Raquel out on the town late at night with a rich french executive did not sit right with me. So Raquel came up with the idea that could be there. I would be the limousine driver for them, but I could not say that I was the husband no matter what happens. With that idea it sounded alright.Saturday night came around and I.