It took sometime for the motorboat to be brought around to the dock from the boathouse which was fortunate for Cindi who needed the rest. The instruct...ons were given to the men. One by one they were to get on the large two-man surf- board that would be pulled by the boat. The challenge was for the men to fuck Cindi in the ass, as they were being towed behind the boat. They were to complete the fuck without falling off. The men were to stand, knell whatever behind Cindi and hold onto the same. He places them behind his head; he knows at this point he can’t touch. I’m in control. I lift myself, placing his cock at my entrance. I look him in the eye, and make him beg me for it. He’s already trembling and aching for it. I can feel him throbbing hard for me, twitching for the feel of my pussy on his thick cock. I don’t give in easily; I make him beg until he’s blue in the face. All the while, I grind, teasing him, allowing just the head to enter me. This only sends him over the edge,. . I suggest you read our orders." I nodded at Grace. "She may be tiny but she'll put your ass in the hospital."So, he stood there, our orders in hand, and went from bright red to sheet white and back several times. He snapped to, saluted, we saluted, I first, and Grace that tiny bit later that superior officers have to let you know they know."Where is your aircraft, Sir." The idiot ... didn't get the difference.I motioned him closer, read his name tag, and said, "Jim, I'm not the one to ask.. After a few minutes of washing I heard the door open “what the?” I thought than watched his sister walk in and headed to the john… She didn’t say anything to me until she was done. “ You’ve done a great job” she said fixing her hair in the mirror “my brother is really happy” “thanks” I said trying to hide behind the frosted glass. “Here” she said joining me in the shower, I didn’t realize she had taken her clothes off “let me rub your back” I quickly grabbed my tits and pussy trying not to.