He gave my round ass a hard slap that made me scream at the top of my lungs for him to fuck me like there was no tomorrow.I could feel myself building... towards the edge. By the sound of his groans, he was close too. I slammed back to meet his thrusts as he drilled away. The fire inside of me was white hot as I neared my peak. With a final hard thrust he sent me spiraling over the edge."OOOOHHH FUUUUCCKKK YESSSSS!" I screamed as my hold body went into a spasm. It was one of them most intense. We dried off, wrapping the towels round our bodies and went into my room, which always got the sun in the afternoon. We rubbed our hair with the towels, standing just inches apart, so it was too easy for me to stroke the top of Sarah’s foot with my toes. “Ooh that tickles!” She said. “Good!” I looked at her sheepishly and then she whipped the towel from my hands and grabbed me by the waist. We tumbled on to my bed and our boobs squashed together as we kissed. I opened my mouth and let Sarah’s. "Oh my god, that's so awesome!"I instinctively fell to my knees and kissed the tip of it. I could seeit stiffen and lengthen to a full ten inches. It had to be the largestcock I'd ever seen in my life. I looked up into his eyes as I twirled mytongue over the head of it. He was staring at me with incredulous eyes."Just go with it, baby," I said as I went down on him as far as I could. He was too massive for me to take completely down my throat, so Imassaged the rest of him while I sucked on. I was a little surprised and all I could think of was, "Well, duh!"She just laughed a bit and said, "The doctor will be in soon!" I was the last appointment of the day so I knew it would be a while because they usually got more behind schedule as the day went by. Sure enough, an hour late she finally showed up. She was an older woman, probably close to doctor retirement age. She was in good shape, and today was looking a little bit frazzled. She sat down on a stool, took a drink out of her.