MICHAEL<br/><br/>I had a wonderful view of Carly's body as she walked over to Dad, and dropped her knees, taking his cock in her pretty little hand, and stroking him slowly.  This gave me more freedom to move, and more of Sarah's body to explore with my hands, which I slid from her thin waist, to her soft, and firm ass.  As nice as it was fucking Sarah while Dad was fucking her ass, I had much more room now to move, which I took advantage of, by slamming my cock harder into Sarah's tight cunt, hard enough to rock her slim body forward against Sam, and in time with the movements of his hips, making it possible for him to ram his cock deeper into Sarah's mouth.<br/><br/>God what a wonderful family vacation!  Mom was an absolute genius.  I couldn't imagine ever being sexually spent, but I was going to try my best to achieve.<br/><br/>"Oh damn, Sarah.....you feel so good."<br/><br/>I could feel is suddenly building inside me, that familiar tensing told me my orgasm was building, and cumming inside my sister, the thought of doing so, knowing how wonderful it was going to feel, aroused me more, and brought it so much closer to happening.