Squeezed in between, Jess wriggled an arm free beneath the water and brushed Ryan's engorged cock. "Oh!" she said, and a long moment passed while they caught each other's eye.
"What is it?" asked Caleb.
"Nothing," said Jess. "I thought you were going to try and dunk me again." Her lips turned up in a slight smile that only Ryan could see. Then she reached with one hand underneath the waterline and groped for Caleb. When she found him, he flinched and then gasped a little as she closed her fingers around his shaft. He told her that maybe he was done dunking her because he liked her just where she was.
Jess stroked him, aware that Ryan probably knew what was going on. Ryan had gone quiet ever since Jess had inadvertently bumped his hard on. She ran her thumb over Caleb's cockhead, looking into his eyes, seeing him bite his lip.
"Feel like going back inside?"
Caleb nodded and Jess squeezed him.
"I think I'll stay here for a little," said Ryan, a shade of embarrassment still in his voice. He watched them, Caleb clambering awkwardly up onto the deck, his erection bobbing and evident. Jess came up second and Ryan felt a pang of jealousy when he looked at her body glistening in the sunlight. It had been a while since he had seen his sister naked. He tried to recall how she had looked that day, how she had initially covered her small breasts with one hand, turned her back, cried out in surprise, but then relaxed and faced him, before Ryan fled the room. Her breasts were bigger now. That day he had had a good long look between her legs, at the soft hair covering her mound. Later that afternoon he felt like he needed to apologize and knocked on her door.
"I'm not embarrassed," she said. "You shouldn't be, either."
He told her that he didn't want her to think he had done it on purpose and she said, "Even if you had. Just forget about it, alright?" She had looked up at him with her hands on her hips, wearing a shirt that didn't even cover her tummy. Truth be told, he'd had a lot of impure thoughts about that afternoon, thoughts that took him inside her room, onto her bed, taking off those short shorts and belly shirt, having another good long look at what he had seen earlier. But every time he went there in his mind he felt guilty. Not guilty enough to keep from thinking about it, but guilty.
It was how he felt now, cock ready to burst, standing in the pond, watching his sister and best friend walk naked up the hill. He knew what they were going to do, too, and he felt more than a pang of jealousy this time.
*****
"Was it worth the wait, babe?" Jess purred twenty minutes later, lying in Caleb's arms.
Caleb nibbled on her ear, his head on her shoulder, his mostly-hard cock still inside of her. "You almost made me wait too long. Another five minutes of you rubbing up against me in the pond and I would have bent you over the side of the dock."
"Public sex. Kinky," she said, squeezing her walls around him.
"Technically I think it's just exhibitionism. Can it be public if there's just one audience member?"
She squeezed again, making him harder. "One brother counts as a thousand strangers. I think that's the exchange rate."
He turned Jess onto her tummy, staying inside her, feeling her leak out around his now rigid dick, chest in her back, pressing her into the overstuffed mattress. "Who would you rather have watch you, baby? A thousand strangers?" He arched his back and pushed himself fully into her cream-filled tunnel. "Or Ryan?"
Jess moaned. "Oh fuck," she whispered. "You're bad." She lifted her hips up off the mattress and ground her ass against him.
"Well? An auditorium of strangers or Ryan?" his voice was a low growl in her ear.
She twisted her face to him, eyes glinting. This little cabin can't hold a thousand people so..." she said, and then clenched her pussy around his shaft. "How did you get big again so fast?" She wriggled, shaking her slender ass, pushing herself all the way onto his dick until a trickle of warm semen seeped down her thigh. "That turn you on? Fucking me while we're watched?"
"Mmm-hmm," Caleb groaned. "Just like it turns us both on when you get loud and we know he can hear us." He rocked his hips into her, ramming himself into her dripping pussy, making a satisfying wet squishing noise.
"Oh
FUCK
!" Jess's scream echoed around the small room. "That's how you want me to do it, baby?" Jess said as she squirmed beneath him, sliding her hand to her mound to grind into her fingers. "Deeper, baby, fuck me deeper!" she moaned, loud enough that Ryan could have heard her down at the pond.
Caleb put one hand on her back and rose up, then crashed back down into her, making the bedsprings creak, Jess squealing as he pounded in and out. "I don't even want you to put all your clothes back on later," he breathed in between strokes. He grunted when her slippery walls gripped him, kept up a steady rhythm, rocking his hips, sliding in and out, her moans drowning out the squeaking of the bed. "How bout we have him record us, babe? Something we can watch when we're apart next year?"
Jess didn't answer because her body tensed before she bucked, squirming into her fingers. "I'm cumming," she breathed. "Oh fuck, I'm cumming." Caleb sagged down on top of her when she stopped writhing. "Goddamn," he said. "That was fucking hot. I didn't even cum and that was hot."
They lay there, sticky for a moment, before Jess said, "Good baby. Because I want you to have lots of it for our video."
*****
It wasn't the first time Ryan had gotten off to the sound of his best friend fucking his sister, but he wondered if it might be about the last. He still felt a sharp surge of shame that peaked a second after he came, but listening to the two of them was just so fucking hot. And besides, he couldn't very well help it, could he? They went after each other like animals and they didn't care that he knew. Plus all the shit that Caleb had told him about his and his sister's sex life was enough to fill half of a Penthouse Forum. So why did he feel so goddamn weird whenever he erupted, wishing his cock was inside his sister's snug pussy? He probably wouldn't think about it so much when they weren't around him anymore, he reasoned, as he used a tissue to wipe up the semen that covered his belly and chest.
He stood up, bare feet on the wood floor. Christ it was hot. Hot enough that he felt like standing in front of the fridge all afternoon if he knew it wouldn't burn out a fuse. Jess and Caleb had gone silent next door, probably sleeping off their romp. He might as well get a head start on the beer, so he padded on out to the kitchen, shirtless and sweaty.
They didn't come out of their room until he was halfway through the third and pleasantly buzzed. He heard them from where he sat on the porch swing and waited for them to find him outside. What he saw surprised him a little bit. Jess had changed into a pair of panties, but she was still shirtless. He looked at Caleb, who just shrugged. "It's hot," said Caleb.
"Guess that's one way of putting it," Ryan said, then blushed, not too buzzed to recognize the double meaning in his words. He picked up his beer, drained it, hiding his embarrassment. "We got a couple of cases in there," he said. "You've got some catching up to do."
"Yeah, we were busy," said Jess, cracking her beer and sitting on the swing next to Ryan. "What did you get up to?"
It was too hot to stay in the house he told her, looking out over the pond, trying to suppress his earlier thoughts. The buzz hit him harder partway through his fourth beer and he worried a little about what he might say. Fuck it, he thought. I'm drunk and I'm sitting here with my two best friends in the world, having a beer on a perfect summer day.
It was a haze after that for a while. He remembered Caleb telling him not to get too drunk, that it wasn't even 2:30 in the afternoon, he'd pass out before dinner if he kept hammering beers like he was. At some point Jess dragged the kitchen table in front of the fridge, cutting all of them off, then Ryan chased her out of the backdoor, onto the grass, with Caleb chasing Ryan, the three of them falling down in a grassy heap, wrestling like they did when they were in grade school.
Ryan was always the strongest, but Caleb was wiry, quick, and had almost pinned Ryan before he kipped up, breaking free, using leverage to flip Caleb onto his back. He had him down for almost a three count when he felt his shorts being pulled down and off him, heard Jess giggling behind him. He stayed with it, though, bellowed "Three!" and rolled off Caleb, snagged Jess's ankle before she could get away. He pulled her to him, fighting off her kicking and jerking, and dragged her until he could get his arm around her waist, the two of them giggling so hard Jess snorted. "Get her arms, dude," he said to Caleb, and when Caleb put her into a full nelson, Ryan reached for her panties and yanked them down over her squirming legs. "Fair's fair," he said, then laid back onto the warm, dry grass and rested for a moment while his head spun.
