Author's note: Lots of kinky exhibitionism, voyeurism and incest ahead! Also some mild drug use. Peter, the family's neighbor, makes a return in this episode, so if a friendly, somewhat portly gent joining in the fun bugs you, you might want to read something else. If you like the story or have some useful feedback, I'd love to hear from you. This story is a side project I hammer away at when I need to take a break from other stuff, but comments and positive feedback encourage me to keep at it and get the next part out faster.
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I stretched out on the chaise longue. The sun massaged me with its warm rays, the heat combining with my post-coital glow to suffuse me with blissful languor. I blinked behind my sunglasses and refocused on my book. On the chair beside me, mom turned the page of her own novel.
"You should call back Mrs Blanchard about that job today," she reminded me.
"Mmm, I will," I drawled.
I heard a car door clunk shut. There was a murmur of voices that my sanguine state tuned out and I delved back into the book I was reading. Fifteen minutes later, the back door slid open and Cat stepped out, dressed in a delicious, flower patterned string bikini, a rolled towel under her arm.
"Hey guys," she greeted us, dropping her towel on one of the poolside chairs.
"Hey hon," said mom. I idly waved at my sister.
"Had a good run?" asked mom.
"Yeah, it was nice," said Cat. "Ran into Peter out front - invited him over for a swim. That cool?"
"Of course," said mom.
Catherine slowly walked down the steps into the shallow end of the pool and pushed herself onto her back. I watched as she floated into the centre of the pool. There was a clank as the side gate latch lifted and Peter came around the side of the house, clad in a pair of swimming trunks, his barrel chest bare.
"Heyo!" he announced his presence, his deep voice cheerful, as usual.
"Hi Pete," said mom. Feeling delightfully lethargic, it was all I could do to manage another wave.
"Gonna be a scorcher today," said the big man, wading into the pool. "Perfect for a swim - thanks for having me 'round."
"You know you're welcome any time," said mom, looking up from her book to give Peter a quick smile.
I turned a page and sank back into the novel I was reading while Peter leaned back against the side of the pool and closed his eyes. Cat was still drifting in the centre of the water and mom was happily absorbed in the pages of her own book. It was comfortably quiet - just the sound of grasshoppers chirping and the occasional call of a bird. The book I was reading was awfully good and I lost track of time, traipsing through the pages at a rate of knots until the splash of falling water drew me out of my reverie.
Cat pulled herself out of the pool and wandered over to her towel. I watched over the top of my book as her tits bounced gently with each step. She unfurled the rolled up cloth and spread it on the flagstones before walking over to the table beside mom and picking up the bottle of sunscreen that sat upon it.
Returning to her towel, she proceeded to coat her skin with the thick liquid. I couldn't help but watch the endeavour, my eyes drawn to the pleasant way her boobs squished as she rubbed them down and the way her eye-catching, flat stomach rippled as she twisted to do her arms. After watching her finish coating her front, I was about to offer to do her back when she looked over at Peter, who had just climbed out of the pool.
"Can you get my back?" she asked.
"No problem," said Peter.
I watched over the top of my book as Cat handed Peter the sunscreen and lay down on the towel. The big man straddled her ass, squeezed a healthy dollop of cream onto his palm and began rubbing it into her skin. While he worked it in, I noticed Cat push her ass up against his crotch. She moaned quietly as Peter squeezed the flesh where her shoulders met her neck, his big, rough fingers sinking powerfully into her muscles. Still gently bucking her ass back against him, Cat reached back to undo the knot that tied her bikini top.
From behind my sunglasses, I could see that Catherine's soft sounds and insistent grinding was having a predictable effect upon our neighbour. A prominent bulge tented the front of his trunks. He grunted quietly and pushed the hefty swelling against her butt as he worked his hands down her back. Once he reached her asscheeks, I watched Cat casually reach down to undo the bows that tied the strings running just below her hips. Peter calmly pushed the unlaced bikini bottom out of the way, scandalously squeezing my sister's exposed ass.
Cat opened her eyes, which had been closed in bliss up to that point, and looked back at Peter. She very deliberately arched her back, raising her buttocks, presenting herself to him. Had a UFO appeared over our backyard right then, my gaze would have remained locked on the salacious scene before me. There was no way I could stop watching.
Peter leaned forward, supporting himself with one hand on the ground, and used the other to pull his swimming trunks down. His fat cock flopped free, slapping against Catherine's buttocks. Returning his hands to those marvellous globes of flesh, her pried them apart and nestled his tool in her asscrack. Cat resumed her gentle bucking, nursing Peter's hefty organ to full hardness until it lay, bloated and stiff, between her asscheeks. Having prepared the slab of meat for the task she required of it, my sister calmly pulled her legs out from under our neighbour and raised herself onto her hands and knees before him.
Without any fuss, like it was the most natural thing in the world, Peter got to his feet, squatting behind my sister's offered hindquarters, and fed his cock into her pussy.
"I'm feeling a little peckish," said mom, putting her book down, seemingly oblivious to our neighbour mounting her daughter like a farm animal right in front of her. She looked over at Peter, who had begun to slowly thrust his girthy shaft into Cat's cunt. "You going to join us for a bite to eat?"
"Ngh- sure," grunted Peter, his hands clamped to Catherine's amazing ass, his hips flexing as he fucked her with leisurely, lazy strokes. "Thanks."
"Hmmm, I might order in some Thai," said mom. "Any requests?"
"I'll take a pad thai, Pam," said Peter, his thighs slapping softly against Cat's with every unhurried thrust of his hips.
"Make -uh- mine a pork -uh- pad see ew," said Catherine from beneath the large man. She dropped from her hands to an elbow and reached between her legs to massage her clit as Peter serviced her.
"Alex?" said mom, turning to me.
I tore my eyes off the depraved vision of Peter and Catherine's casual, bestial mating.
"Uh, green curry and rice please," I blathered. My cock was once again trying to starve my brain of blood, despite having spent itself so wildly that morning. So distracted by the nonchalant carnality occurring in our backyard, I hadn't even realised the obscene way the swollen monster was tenting my swimming shorts.
Mom pushed her sunglasses up and gave me a knowing smile before leaning over and picking up her phone.
