“Holy fuck,” she squealed looking down between our bodies, “Jesus Christ, Eddie. I’m fucking cumming! You’re making me cum!”
She screamed in passion a moment later as an orgasm ripped through her body. I was suddenly very glad my downstairs neighbor worked third shift. Cindy wrapped her arms around me and I could feel her nails digging into my shoulders as her body tensed and her pussy clenched down on my still pumping cock. She buried her face into my chest and squealed again as her body shook in orgasmic pleasure. I slowed my pace as Pip finally released her death grip on me, her body jerked a couple of times as she finally came down.
“Holy shit,” she gasped, whipping her hair out of her sweat covered face, “That was, by far, the most intense fucking orgasm I have ever had in my life. I think you broke my pussy.”
“Feels like it’s still working just fine to me.” I said, still slowly sliding in and out of her.
“Well how about you fuck me from behind and we find out.” she said, that mischievous smile creeping back onto her face.
We quickly changed position, my sister getting on her hands and knees and me kneeling behind her. She wiggled her ass at me and looked back at me over her shoulder. I moved in behind her and guided my cock back into her steaming hot cunt. Cindy squealed again as she felt me inch my cock into her and bit her bottom lip. I grabbed her hips and started fucking her again, starting off slow but with her urging sped up until I was hammering her again. She was whipping her head around and groaning, occasionally saying things like “yes”, “so fucking good”, “harder”, and “oh god”, but mostly it was wordless grunts and squeals of pleasure.
She was certainly the most animated and vocal partner I’d ever had. Sure the other women I’d slept with had moaned and groaned and writhed in pleasure, but nowhere near what Pip was doing. It was like finally getting the cock she’d been dreaming about for years turned her into a sexual monster. Looking down at my cock sliding in and out of her, and the smooth tanned skin of my sister’s ass triggered something in me too, and before I could even stop to think about what I was doing, I gave her a firm slap on her ass.
She whipped her head around and looked at me, “What was that for?”
I slowed my pace but didn’t actually stop fucking her, “I… I don’t know… I don’t know what came over me… Pip, I….”
She flashed that mischievous smile again. “Do it again.”
The look of apologetic concern on my face turned to confusion, then into a smile as I brought my hand down onto my sister’s ass again. I picked up the pace of my cock in her pussy as I slapped her ass again.
“Harder.”
I slapped her on the other cheek, and again was urged to spank her harder. In fact every time I landed a blow, Cindy urged me to spank her harder. I was slamming my cock into her as hard as I could while simultaneously landing blow after blow to her ass cheeks. First the right, then the left, then back to the right again. Both her cheeks were bright red after just a few more slaps. I reached up and grabbed her hair and pulled her head back.
“You’re a naughty little girl, aren’t you?” I asked her, leaning over her back.
“No,” she hissed, “I’m a nasty little slut.”
“Whose slut are you?” I asked.
“Yours,” she gasped, “I’m your slut.”
“Whose cunt is this?”
“It’s your fucking cunt.” she squealed.
“Don’t you fucking forget it.” I said, letting go of her hair. I sat back up, grabbed her hips and fucked her for all I was worth.
I had no idea where that had come from, I had never talked dirty like that to any other woman I’d slept with. I mean, there was dirty talk, but nothing like the exchange Pip and I just had. But, strangely enough, it felt natural. We had always teased each other when we were kids. Aside from constantly calling her Pip, I used to call her things like brat and snot, and she’d call me jerk-face (fuckface as we got older) and dork. In fact 90% of the time, my sister and I hardly ever used our actual names when we talked to each other. If it wasn’t just calling each other bro and sis, it was one of the many nicknames we’d given each other over the years.
I was nearing the point of no return and I could tell Pip was too.
“Goddamn, I’m cumming again.” she squealed.
I felt her pussy clench down on me and the warmth as pussy juice leaked out of her and I lost it. I practically roared in pleasure and I slammed my cock all the way in her and exploded deep inside her. The two of us were grunting and groaning in orgasmic pleasure as I pumped several loads of cum deep inside my sister as she convulsed on my cock.
After a full minute of the two of us riding out our orgasms, I slowly pulled my cock out of Cindy’s pussy and flopped on my back next to her as she slowly lowered herself down onto her stomach. Neither one of us said anything for a couple of minutes as we tried to catch our breath.
“What is it?” Pip asked me.
“What?”
“You’ve got this look on your face,” she said, “Like you just unlocked the secrets of the universe.”
“It’s not that,” I said, “I just realized something. I just fucked my little sister.”
“Yes, you did,” she said, “And it was fucking amazing.”
“But I came inside you.”
“Yes you did,” she said, rolling onto her side and propping her head up on her hand. “But it’s okay, I’m on birth control. Have been since I was 18, mom insisted.”
She snuggled up to me and I wrapped an arm around her. We lay there for a few moments in silence.
“So that whole ass slapping thing…” I eventually said.
“It’s okay,” she said, “Sometimes I like it rough, and I I know you weren’t trying to hurt me.”
“It’s just, I’ve never said or done anything like that before,” I said, “Something just came over me, and… I don’t know.”
“Like I said, don’t worry about it,” Pip said, “That was the best sex I ever had. In fact I’d have to put you in my top five.”
I arched an eyebrow at her, “Top five huh? Exactly how many guys have you had sex with?”
“Including you?” she asked, I nodded. “Five.”
I rolled my eyes and laughed. “And where do I fall on that list?”
“Number one of course, did you not hear me just say that was the best sex I ever had?”
“I did, I just wanted to hear you say it again.” I said, laughing.
“Asshole.” She gave me a good natured punch on the arm and snuggled back into me. “I’m glad you came to the club tonight. I’ve been waiting 13 years for this day, and it exceeded all my expectations.”
I kissed her, “I love you, Pip.”
“I love you, too bro.” she said, resting her head on my chest.
We eventually drifted off like that. When I woke up the next morning the bed was empty. I heard the toilet flush and Cindy walked back into the room still naked.
“Damn, you’re up.” she said.
“That’s a bad thing?” I asked, rubbing my eyes, stretching and yawning.
“I wanted to wake you up with a blowjob.”
“I could pretend to still be sleeping.” I said.
Cindy slipped back into bed with me, “It’s not the same, you’ll be expecting it now. I mean I’m still gonna suck your dick, but first…”
She reached down and grabbed my semi hard cock and slowly stroked it back to life, and I reached between her legs and started rubbing her clit. We kissed again as we lay there masturbating each other.