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He nuzzled into her neck and hair, “Things are always better when there’s trust between us,” and he gave his still turgid cock a bit more of a push into her cum-soaked hole.
“Ah!” she cried, and that sweet little motion was enough to send her off the deep end once more, her face pressed into the sand as she felt that electric buzz go through her. Oh, how often had they fantasized about this? How often had they, in the dark of night, pleasured themselves to the thought of the other.
It was so wrong, yet her body quaked beneath his large cock, and she cried his name into the sand.
Their bodies shimmered in the moonlight, perspiration reflecting the silver gleam. With her second climax, Zach was left feeling like king of all existence. It hardly even bothered him that he’d fucked her ass as second prize. It just felt exquisite too, no matter how he looked at it, and he embraced her warmly, letting their bodies climb slowly down from their highs as he stroked her tan flesh and kissed her soothingly. “You’re perfect, sis,” he remarked at last.
“I wish you wouldn’t say that,” she sighed, feeling her body relax beneath him, her muscles weak and quivering with the power of her orgasm. “It’s weird.”
He leaned forward and bit her shoulder, forcing that thickness a bit deeper into her ass in the process. “I can’t call you lover, I can’t call you sis, why can’t you just be happy with how things are?” he husked, grinding himself into her.
It was all weird. She groaned and tried to wriggle free of that beautiful cock that kept her pinned, her ass squeezing him so tight. “It’s just weird,” she whimpered. “Fuck, it’s wrong, Zach. I love you, you know that, but this isn’t right.”
He’d had his satisfaction, he’d reached such peaks of joy and sensation, but her defiance kindled something in him, and he pushed her shoulders into the sandy dirt harder. He wasn’t done with her, and he kept pumping his cock into her ass slowly but steadily. “Just give in, sis,” he commanded in his lusty voice. “I’m your lover now. Your man,” he added darkly. “Say it,” he ordered, her tacky walls clinging to his thick girth as he dragged it back and forth along them.
“Zach,” she cried, her body pressed down into the dirt as she struggled uselessly beneath him. “C’mon, stop.” Her breath was so groggy from her orgasms, from the depths of pleasure he’d forced her to, and yet it still wasn’t enough for him. Her body was almost laying fully in the sand except for her hips that remained up and against him.
He was breathing heavy as he reached a hand to her head, curled his fingers about her blonde hair and pulled. “Say it sis,” he commanded through clenched teeth, the whole act reinvigorating his cock as he fucked her up the ass. “Say I’m your lover. Just admit it,” he ordered in his steady voice, not angry. Not worked up. Just smooth and commanding. “Don’t hide who you are. Not here. Not in paradise.”
“I don’t know why I have to say it if you already know!” she said loudly, her head tugged back and her body trembling under his force. She was breathing so hard, her body so sensitive to that prickle of her scalp, to his cock pumping her ass.
It was so, so wrong that they loved each other like they did, but to admit it was almost impossible for her.
It was like a manner of punishment now, fucking her in the ass with his rigid cock. He’d only just came, and though he took pleasure in it, it was mostly from the act of controlling her. Of pinning her and trying to bend her to his will. “Just say it,” he urged, and thrust his dick into her deeply, cramming almost all of that thickness into her tight sphincter. “I’m your lover now,” he grunted, “your husband. Say it,” and his hand tugged back on her hair harder as his balls slapped to her puffy pussy lips.
“Oh god,” she whimpered before shouting, “Fine! Fine Zach, you’re my lover.” Her feet flailed and she squirmed beneath him, feeling his hand tighten on her hair. “Fuck!”
She was such a sweet treat, his twin sister. How she had managed to save it all those years, giving her virginity to her brother, it was all too delightful. Too delicious. And even as his hand grasped her hair, they both knew she still trusted him more than anything or anyone else.
He was her brother, after all.
That triumph was fleeting though, and he was nearly disappointed afterwards. He didn’t want to stop by that point. So he didn’t.
He tugged her hair, keeping her body pinned as he pistoned his dick into her ass. “Good,” he said in his hoarse voice. “Now say you’re mine,” and he nuzzled into her neck, “say it. You’re mine,” and he bit into her neck, feeling the full length of his veiny shaft swell within her, the bulging crown keeping him lodged deep.
“Zach,” she shivered against him, her body covered in a layer of perspiration that was drying against the air, leaving her body filled with goosebumps. “Zach, stop,” she gasped, his sister begging for release, for him to stop using her body so. She was worn out, exhausted, and she would have drooped down if not for his strong grasp.
She felt him give a sudden and erratic thrust, a lewd groan followed by a throaty repeat. “Just say it,” he said, pulling back her hair and biting her neck. She couldn’t even be sure if he came again, for he was so insistent on getting her to submit.
Her body trembled and rocked against his, but he had worn her down, and those words tumbled from her mouth, “I’m yours.” She sounded so soft and defeated, not at all like the Zahra he knew, but wasn’t that the point? To make her something better.
To make her his.
That final submission did it. He stilled his harsh motions at last, and if he came just before it didn’t stop him from doing so again. He spasmed, his body undulated once and he shook as he came inside her ass once more. He moaned her name in such an intense, warbling voice, then clutched onto her, both arms wrapped about her torso as he stilled at long last.
She was his. As she should be.
3
-Part 3-
Things had been wonderful, as far as Zach was concerned. He’d done as he said and carted back much of their beachfront home, including the heavy bed, which had taken many hours to lug through the jungle.
As he stood sharpening a point on another spear, nude as he always was now, he examined the tip. He’d satisfied himself with his preparations, he thought, and he smiled to himself happily in the grotto. “How’s that food coming, sis?” he called over to her.
She was still so modest, so uncomfortable strolling around with nothing around her sex, and had tried to tie a bit of cloth around her waist, but it kept falling off. Frustrated she had left it aside, but it didn’t stop her from trying to shield her sex whenever she could.
His beautiful sister, naked from the chest down, and all his.
