I passed it off as just a woman’s feelings that had no explanation. It was really my uncontrolled extreme joy and exhilaration.We did it two more ti...es that night with similar results, leaving out my crazy laughter and with less ass slapping. My poor cheeks were already stingingly tender. He did add slapping my clit with his splendid cock. That brought me to orgasm once I got over the startling, electrical-like shock. My nips were not overlooked in his rather complete attention to my body. He. When my prick hit the cool air of the room, I could almost feel my sister’s gaze envelop my cock.“God!” Donna gasped as she stared at her brother’s big prick standing up at an angle from my crotch. A feeling of pride mingled with my lust. If I’d learned anything the past few days, it was that I had a prize winning pecker for a guy my age.Now came the more difficult part. With my sister staring at me an arm’s length away, I had to grab my prick and pump it until the cum flew. I sat down. She didn’t fight when he pushed her forward and bent her over it.His hands ran circles over her round spherical buttocks that were presented before him. “God, you’re too tempting in these sexy panties.” She felt them slip down over her hips exposing her most intimate places to him. She waited expectantly to feel his hand come down to spank her, but instead he went straight to the teasing pleasure and she gasped.“I know how much you wanted to be spanked, you dirty girl, but we don’t have time. I grab your left foot and straighten out your leg then do the same thing with your right. Your legs now spread in a V-shape.My cock is fully erect and harder than it has ever been. I slide up the bed, positioning my arms near each of your shoulders and slowly lower my body till my cock is touching your right thigh. Very lightly, I start to slowly grind my cock on your thigh, rubbing up and down.You start to awaken and can feel my warm cock rubbing against you. "What are you doing back.