Author's note: This is a work of fiction. All characters are eighteen years or older. Anal sex is a major theme in this story, so you might want to consider reading something else if you're not into that sort of stuff. Don't expect realism and you won't be disappointed when you don't find it! Enjoy!
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Despite having already had summer jobs at the local fitness center for the past two summers and regardless of the fact that they didn't mind working and indeed felt good about pitching in and doing their part within the family economy, Michelle and Tyler couldn't help but feel a bit antsy and restless this time around, at least initially.
The reason for the siblings' shared sense of worry was their naughty concern about having less time to spend together doing what recently had become their favorite activity ever: having lots of hot, passionate anal sex. Indeed, their latest encounter with Gabby, during which the saucy brunette had watched them buttfuck like rabbits on her bed, had opened up a whole new world of titillating possibilities that Michelle and Tyler wished to explore further and that now, they feared, could become significantly limited due to their working schedules.
Luckily for them, once their first day on the job rolled around, the siblings realized that they needn't have worried after all. Indeed, things had already begun looking rosier the night before they were supposed to start working at the fitness center.
Without any pretense but instead explicitly telling them that she was dying to see an encore of their epic incestuous coupling, Gabby had invited Michelle and Tyler to her place, getting a response characterized by a lewd enthusiasm that matched her own. Once there, the siblings had quickly turned the brunette's bed into their sexy playground once again, sucking and fucking like the horny teenagers that they were while their sassy friend fingered both her holes to multiple orgasms and avidly watched the awe-inspiring spectacle of brother and sister giving and taking and sharing so much sweet, forbidden pleasure. Like she had done the first time, Gabby had once more dutifully refrained from interfering at all while Michelle was busy slurping away on her brother's fat boner or when Tyler had first devoured then deeply plowed his little sister's deliciously wet pussy and sinfully tight asshole before fucking each snug hole like his life depended on it. This time around though, once the siblings were done fucking Gabby couldn't just limit herself to gathering up the overflow of their mingled juices, but had instead chosen to push the unspoken boundaries that the three of them had implicitly established and maintained so far.
Crazed with voyeuristic horniness and once again awestruck by the mix of savage lust and true, deep love exuding from Michelle and Tyler's entwined bodies and conjoined sexes, Gabby had jumped off her chair and sat on the edge of the bed where Tyler lay on his back with Michelle's curvy frame snuggled on top of him, her plump bubble-butt fully impaled on his horsecock as she straddled his lap. While the siblings languidly made out, moaning their joy into each other's smooching mouth and savoring their shared afterglow like they were the only humans left on earth, Gabby had reached for the very base of Tyler's huge dong and wrapped her fingers around it right where Michelle's overstretched sphincter gripped on its fleshy girth and suckled on it while a frothy sheen of runoff cum started to slowly form all around it, testifying to the hugeness of the load that her brother had just pumped into her snug rectum. Even as she marveled yet again at the fact that her petite friend could take a slab of dickmeat as imposing as Tyler's balls-deep up her ass, Gabby had grabbed firmly onto the broad root of that veiny schlong and pulled it out of Michelle's narrow, sperm-filled anal chute.
In one slick motion, the lust-high brunette had managed to extract the full massive thickness of Tyler's truncheon from the cozy depths of Michelle's forbidden passage, until his fat glans had slipped out of her distended bootyhole with a lewd squishy pop. Within moments, before Tyler could complain about not feeling the steamy caress of his sister's tight rectum pulsating and rippling all around his boner or before Michelle could voice her displeasure about the sudden maddening sensation of emptiness inside her needy asshole, Gabby had already gone on a feeding frenzy so wantonly intense that the siblings were soon moaning in unison as their friend voraciously alternated between stuffing Tyler's huge cum-glazed sausage down her throat and clamping her lips onto Michelle gaping seed-oozing orifice to suckle out the rivulets of freshly deposited sperm dribbling out of it while her tongue wiggled and poked into her well-fucked anus.
Unexpected as Gabby's butt-licking and dick-nursing rampage had been, neither Michelle nor Tyler had complained about the ass-eating and cum-gathering tongue swipes or the slurping shaft-engulfing suctions she was treating them to. In fact, once the brunette had finished lapping up every last creamy trace of semen coating Tyler's schlong and had swallowed down the last trickling drop of pearly ejaculate escaping Michelle's twitching and once more tightly sealed little backdoor, a general sense of satisfaction had descended upon the trio and nobody had felt any need to dwell upon the fact that Gabby's previously passive role as self-pleasing observer had just gained a new and way more active connotation.
Understandably, in light of the previous night's super exciting escapades, Michelle and Tyler started their summer jobs with a certain spring in their step, their initial misgivings about having less time to enjoy each other's naked company assuaged by the realization that, if Gabby was now going to participate more often in their couplings and was going to offer her remarkable oral skills again (all of which seemed more than likely to be the case, based on the collective pleasure registered the previous evening), then maybe the increasingly naughty quality of their sexual encounters, especially the ones including the brunette, would make up for their probable reduction in quantity due to their working schedule. That sounded like a fair enough bargain already to the siblings, but it only took a few hours on the job for Michelle and Tyler to discover that maybe they wouldn't even have to give up on quantity after all.
Given his previous experience as a lifeguard at the fitness center for the past two years, not to mention his reputation as a hard worker and a generally solid and reliable young man, Tyler wasn't just assigned to the outside pools this year (which was already great news because it allowed him to be always in visual contact with Michelle, who was working at the smoothie kiosk near the tennis courts nearby), but he was also given supervisor duties as well. Beside entailing a slight bump in his paycheck, that relatively minor career advancement came with the perk of receiving the keys to the employees locker rooms and a few other structures within the center, including the small maintenance building adjacent to the main edifice. Much to his glad surprise, when he took an exploratory tour of the equipment-cluttered and chlorine-smelling maintenance shed, Tyler noticed a door half-hidden behind a stack of big cardboard boxes. Upon closer inspection, he verified that yes, as he had initially suspected, that old and clearly long-unused door opened right into the staff locker rooms, specifically into a tiny broom closet sort of space within the women's locker room, where, among others, his beloved Michelle changed into her uniform and left her stuff.
That random revelation brought a huge grin to Tyler's face and gave him an instant boner, which was a bit of a problem given the massive tent it caused in his swimming trunks, forcing him to wait and patiently allow his erection to subside before he could return to his duties as a lifeguard by the pools. At his next break, when he joined his sister for lunch and gave her the good news, Tyler almost had a heart attack, because Michelle's reaction was so impulsively joyous that she threw her arms around his neck, leaned in and almost planted a big wet smooch on his mouth, right there in plain sight of everyone who might be watching, such was her happiness at the realization that they could turn that barely used maintenance shed into their workplace love nest.
As he reciprocated the tight hug that Michelle gave him after she managed to turn her intended passionate soulkiss into a loud yet more conventionally sisterly peck on his cheek, Tyler briefly looked around to make sure that their almost-kiss hadn't been noticed, but seeing that the coast was clear, he relaxed and enjoyed the feel of her big soft tits pressing against his chest and almost spilling out of her tight cleavage-revealing polo shirt. As they finished their lunch though, Tyler was forced to be the voice of reason and convince Michelle, who wanted to rush to the shed and buttfuck right away, that they would be better advised to wait at least until the next day before sneaking in a quickie at work, so that he could check the comings and goings around the small building and make sure that there wasn't any serious risk that they would end up getting busted, with all that it would entail.
