"They are still busy out there do you want to sneak upstairs?' "Hell yes," Bill grinned. He put down his coffee cup and ran behind his sister while sl...pping her on her ass. They made it to the master bedroom and within seconds were naked and fucking. Neither of them heard the door open nor did they see the body move quietly inside the door. They didn't hear the door close again nor did they hear it being locked. They did feel the body moving onto the bed next to them and froze until they heard. When she took off her helmet and shook out her dark shoulder length hair, I was immediately interested. I kept an eye on her as I discreetly (I thought) sipped on my contraband suds. She found a public water fountain, but grimaced after taking a drink, and began to stretch, working the kinks out of her back from riding. Evidently I was looking at her a little too closely, because she walked toward me across the sand. "I could sure use one of those beers you're trying to hide, if you have one. It was a little embarrassing but it was all in good fun.Everyone continued to stare at Sabrina's huge tits and her long dark brown nipples as she sat down. As innocent and playful as Sabrina tried to make it, my cock was throbbing ready to explode. Also, I noticed that the nipples on both girls were hard as well. Were they enjoying their little display? Did they like our attention? It seemed that they did.The men were first to lose all our clothing and we sat there naked. Both girls took turns. And that she was allowed to think of all the different ways that future might play out ... made her feel less conflicted about it all. Of course ‘the plan’ was specifically set up to allow Jennifer to splay her legs open for me every night if she wanted to, and to let me impregnate her if she wanted that to happen. Her dream of being able to be with me as a lover for the foreseeable future was a strong part of her motivation to move things forward.To that end she started job hunting with a.