“Okay,” she said.
“Wait. What?”
Robin leaned back on the couch and parted her legs. “Fuck me.”
“Are you serious?”
“Just do it,” she snapped, sounding very much like her sister.
Without arguing, he dropped to his knees and that put him at the exact right level for fucking her. Grabbing his cock, she guided him into her pussy as he pushed forward until it was too late for second thoughts. With a single thrust of his hips, he was buried deep inside his sister’s warm, wet pussy for the first time in his life.
“Yes!” she cried out, reacting to the sensation of being filled. She wrapped her legs around him and locked her heels so he couldn’t pull away. He had just enough room to pull back for another stroke.
“Fuck, Robin,” he groaned, suddenly filled with concern over whether they should be doing any of this.
“Yes!” she moaned. “Fuck, Austin. Fuck me!”
He couldn’t deny it. She felt so damn good. He didn’t care if she was his sister or not. This felt too good. He wanted her. He wanted her happy. He wanted her to get off. He wanted to be the guy who made her get off. Seeing his older sister squirming in front of him fucked with his head. He couldn’t believe she was naked. He couldn’t believe she was letting him do this. He couldn’t believe how much she needed it. He fucked her and fucked her with the stamina of a true stud.
“Fuck me, you ass-kisser,” she said with her arms around his neck. She glanced down their bodies but mostly kept her gaze directly on his face. “Fuck your sister. Fuck me harder!”
“Goddamn,” he swore, stunned by the expression of raw lust on her face. “You really want this, don’t you? You want my cock, don’t you? Your brother’s cock.”
“Yes! Yes! Yes!” she cried back, squirming beneath him. “Make me cum.”
“I’m going to fuck you forever,” he said, feeling like he just might be able to do it, too.
“Oh God,” she moaned, still staring up at him. “I’m fucking my brother.”
“Your little brother.”
“You don’t feel little,” she gasped with a smirk.
“You feel good,” he told her, really driving his cock home and doing his best to fill her with his cock. It was finally starting to feel good to him in the ways that would get him off.
“Do it,” she begged. “Fuck me. Fuck your big sister.”
“Cum for me,” he told her, sensing that she was getting close. Grabbing one of her nipples, he clamped his fingers around it and that seemed to be the extra bit of stimulus that she needed. Gritting his teeth against his rising need, he growled at her. “Cum for Austin.”
“Yes!” she suddenly cried out right before her eyes rolled backward and she began shivering beneath him. From the clenching of her pussy, he had no doubt about what was happening. He had done it. He had finally fucked a woman into an orgasm without her touching her clit as he did it. In the back of his mind, he also realized this should be the first time she had had an orgasm from just fucking, too.
He rode her through her orgasm and refused to stop, not that she had asked him to stop. Instead, after her orgasm had passed, she smiled up at him. “Now you cum,” she said, bucking up against him. “Cum inside of me. Cum inside your sister.”
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