So I fucked hard, mercilessly. I lifted myself on my arms and watched my sister's little titties ripple at the impact of my cock inside her. I heard our sweaty bellies slap and watched my cock disappear past her short, matted black pubes only to reappear a second later. I watched her face twist, grimace. She looked at me then, a wild glare like a lioness, thrusting her hips at my invading rod and grunting out her breath.
Still she built, until her whole body tensed, her head and back bent towards me, and she came, hard, so hard I could feel the wet flush on the base of my cock and the walls of her pussy convulsing on my shaft.
My sister came for the third time, mum and dad helping her by flicking her nipples, me keeping up my almost brutal thrusts. Sandy flopped back onto the blanket, swore, then tensed up again in another rippling climax. I stopped fucking her, instinctively knowing she was super-sensitive now. She lay back, twitching, and I thought she had another little rippler. If so, it was her fifth.
I let my weight go back onto her now, and she flung her arms around my neck, kissing me all over the side of my face. Her torso rippled, twitched, refused to settle.
I think it took a few minutes for her to come back to this planet. When she did, she laughed and sent ripples through my cock. She looked sideways at mum and said: "Wow! Who knew my brother would drive me crazy on his cock! Jeez, dad hasn't cum yet?"
"No, but I did just watching you two."
"Robbie hasn't cum yet either."
"Really? That gives me an idea. You kids remember what day it is?"
"Oh yeah!" I said, "It's dad's actual birthday!"
Sandy said: "Oh, daddy, I'm sorry. I was gonna, y'now, do something extra-special today but, well, I'm kinda all fucked out now."
"Don't worry, pumpkin. This day couldn't be any better."
"Oh yes it can, Paul. Robbie, there's this one thing your father wants. Me and you can give it to him. If you're OK with it."
I had no idea what it was, but I was intrigued. Mum went on: "You see...oh jeez, after all we've done together I can't believe I'm blushing saying this! So, here goes. Your dad wants to double-pen me. Since you're the only other guy... do you see?"
I did. It was my fantasy of a couple of days ago, as I came in my sister with my finger in my mum's asshole, and it was going to happen. Right now.
I let her know how I wanted it to be by scooting over a little and pressing her hip away from me. I put my cock inside her for a few strokes, then withdrew and pressed the tip against her asshole. She moved over and above me, sitting on me as she wriggled and worked my cock past the first barrier. Mum supported her slight frame on her arms, beside my waist, and leaned back with her feet planted beside my knees. Dad got in place, pushed, and mum groaned hard.
I felt her asshole soften, resistance fading, so I pushed. I almost heard a 'pop' as it sank inside her, impossibly hot and tight. She winced but told us with her hips that it was OK.
I couldn't see much beyond mum's back but my mind saw it all -- dad's cock inside her pussy, mine inside her ass, and her moaning like never before. After all our family had done together in these few days, this was the dirtiest. I was fucking my own mother in the ass!
Sandy had one more trick up her sleeve. The nimble little minx managed to get her pussy over mum's face, then over mine. She was dripping wet, but that wasn't all.
I felt and heard it before I saw it. A hiss and splash, hot liquid splattering on my chest. I looked around mum's back and there was Sandy, stood pissing on mum's tits. Dad leaned in and drank some, Sandy guided her stream to me and I got a mouthful of salty bitter piss as well. It sent dad wild -- I felt him push, heard him grunt, and knew he was cumming in mum's pussy. I felt my own ejaculation warm through my shaft. A few seconds later, I selfishly pushed mum over. Dad got off her, I pinned her face-down with my cock up her ass and fucked hard.
There was no stopping it. Mum grunted at my weight on top of her, my chest flat against her back, and my seed began its journey, burning a path from my balls and into my shaft, to erupt in molten lava in my own mother's rectum. I pressed, jetted, pressed again. Images in my mind melted into one -- watching mom masturbate, ejaculating in my sister the first time, seeing mom piss on dad, watching my sister wet her pants for him, sit on his cock. I saw in my mind the cum glistening on my cock the first time I came inside my mother. Saw her triumphant smile as I blasted on her tits. Remembered the feel of her hot piss. The sound of it.
Still I came. Lost now in nothingness, I passed out of consciousness. My cock and its anal sheath were all that existed. And I swear, though I thought it to be a myth, that I stopped cumming, relaxed a while, then came all over again. In my brain was my mother and sister sharing my cock with their mouths, my mum's pissing cunt. My sister's cunt pissing on our dad. My cum on Sandy's little titties being washed off by our mother's pee.
Still I came. The final jet, after how many such convulsions? The final jet, looking down, my mother pulling her ass cheeks aside to let me do it to her, and her angry pink-purple butthole with my twitching cock buried right inside it.
If this is not true love, then there is no such thing.