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Suddenly, the other white guy from Bill's group got up and walked towards them. He stood a few feet away, watching the two of them. I couldn't see his expression, but I could imagine what he was thinking. He was probably turned on by the sight of Bill fingering Sarah, and he wanted to get in on the action. Meanwhile, the three black men were still sitting outside Bill's tent, their eyes fixed on the group of girls. Sue, Mary, Lexi, Kate, and Sam were completely oblivious to what was happening in the water. The girls were too busy exchanging glances with the black men, flirting shamelessly and giggling like schoolgirls.

I turned my attention back to Bill, Sarah, and the other guy. I could see that Sarah was getting more and more turned on, and Bill was taking advantage of that. His fingers moved faster and harder, and Sarah tried harder to muffle her moans. His friend was standing behind them, stroking his hard dick. Sarah didn't seem to notice him yet. Suddenly, she felt two more hands caressing her butt and she was a bit shocked. But Bill reassured her and introduced his friend as Chris, who was now also touching her. Chris looked to be in his mid-20s, with a muscular build and a chiseled jawline. He had short, dark hair and his skin was slightly tanned. Sarah turned to Chris, smiling seductively, and said, "Nice to meet you too, Chris. I hope you can pleasure me just as well as your friend!". She responded to Chris's touch by arching her back and pushing her butt towards him. Bill, who was still fingering her pussy, leaned over and whispered something in her ear. I couldn't hear what he was saying, but I could tell that it was turning Sarah on even more. She moaned softly as Chris started to explore her body, running his hands up and down her back and squeezing her breasts. Suddenly, Chris slipped a finger into Sarah's tight asshole, and she gasped in pleasure. Bill kept fingering her pussy, while Chris used his other hand to rub her clit. Sarah was moaning loudly now, her body shaking with pleasure. They played with her nipples, and Sarah was stroking their cocks with both hands. I felt my own cock getting hard as I watched this threesome play out before me. It was such a dirty, taboo scene, but I couldn't look away. I knew I shouldn't be turned on by this, but there was something about the way they were all touching each other that just made me so damn horny. Then, Bill lifted Sarah and she hugged him. He lowered her onto his hard cock and Chris moved behind her, slowly penetrating her asshole.

As I watched Sarah getting double penetrated by Bill and Chris in the shallow waters, my heart was pounding with excitement and arousal. They were going slow at first, savoring the pleasure of the moment, but gradually they picked up the pace. Bill lifted Sarah up and down on his hard cock, while Chris pounded her from behind. Sarah's face was contorted in pleasure as she tried to contain her moans. Her face was a mixture of pleasure and pain, and she kept looking back and forth between Bill and Chris. They were both grinning, obviously enjoying themselves. Sarah's tits were bouncing as Bill pounded her pussy and Chris thrust into her ass. I could see her biting her lip to keep from screaming, but I could tell she was really enjoying herself. They were taking turns thrusting in and out of her, and it was clear they were both trying to outdo each other. Suddenly, Sarah hugged Bill tightly and he whispered something in her ear. I couldn't hear what he said, but I could see the lust in their eyes as they exchanged a heated glance. Bill then lifted Sarah up even higher, causing her to wrap her legs around his waist. She rode him hard, taking him deep inside her. Chris moved in front of her and she eagerly took his cock in her mouth, sucking and licking it with abandon.

As they continued their threesome, I noticed that the three black men from Bill and Chris's group were watching them too. They were sitting outside Bill's tent, smoking and drinking, but they were clearly intrigued by what was going on in the water. Meanwhile, the rest of my group was still completely oblivious to what was going on just a few feet away, as an olive tree was blocking their field of view. Also, the girls were too busy looking at the three black guys. The black guys were clearly watching the threesome with interest, but they were doing their best to act casual and not give anything away. They just sat there, watching and smoking, as Bill, Chris and Sarah continued their erotic play. As I watched from my beach towel, the girls were practically drooling over the three black guys. They exchanged glances across the secluded nude beach, and I could see the hunger in their eyes. Even Mary, who was the only one wearing both the top and bottom of her swimsuit, stripped down in order to draw more of the black guys' attention. Kate tried not to look at the black men too much in case Sam got jealous, but the other girls were shameless in their pursuit of their attention. They laughed and giggled, flipping their hair and striking poses to show off their curves.

Meanwhile, I couldn't take my eyes off the scene unfolding in front of me. Bill and Chris were now jerking off in front of Sarah's waiting mouth in the shallow waters. Sarah was on her knees, sticking her tongue out, waiting for them to cum. I could see the excitement in her eyes as she watched the two men stroking their cocks. "Come on, Chris," Bill said, urging Chris to cum. "Let's give her a big load." Chris groaned and stroked his cock faster, while Bill continued to stroke his own. I could hear Sarah's muffled moans as she took them both in her mouth, eager to taste their cum. Finally, Chris let out a loud groan and shot his load into Sarah's mouth. Bill followed suit, spraying his cum all over her face and tits. Sarah moaned with pleasure as she licked their cum off her lips, savoring the salty taste. As the threesome in the water started to wind down, Sarah stayed in the water, washing the cum off her body as she laughed with the two men. I could see the excitement in her eyes, and I knew that this was only the beginning.