Katie shifted in her chair, leaning over the laptop and letting out a quiet sigh. She was making an effort to focus on the lecture on her screen, delivered in a sleep-inducing voice by a balding professor. She managed to take a lot of useful notes, so it wasn't entirely futile, but there was no hiding it that her mind was mostly elsewhere.
"Fuck," she cursed, groaning in frustration. "I can't stop thinking about... oh!... about him, and about... oooh!..."
A long moan escaped her lips, which her breathy words folded into, as the shapely blonde added another finger to the soppy handiwork between her legs. She spread her tanned thighs a bit more, to give herself better access. She felt a pleasant shiver when the chilly air touched several new, freshly exposed spots inside and outside her sizzling hot pussy.
It aroused her nipples, too; not that they required much. The wanton girl allowed her other hand travel to one of the engorged nubs, squeezing it gently to elicit one more, lusty moan. She continued churning the gooey mess in her soaking wet hole, all the while trying to concentrate on the droning voice in her noise-canceling earbuds.
"O-okay, that's... a bit better," she breathed, now pinching the other hard nipple. "Maybe I just need... to touch myself... more..."
It wouldn't be too difficult -- indeed, Katie was able to touch every intimate spot on her nubile body. She was completely naked right now, which was in fact the normal state for the beautiful, nineteen-year-old girl. Neither she nor her family ever wore clothes anymore, save for her mom's occasional trips to the grocery store. Especially Katie and her brother Ethan, who became permanent nudists in order to aid the sexual education of the inexperienced, eighteen-year-old boy.
Or rather, the *formerly* inexperienced boy. Thanks to his older sister, Ethan had been quickly catching up on the matter, and in a very practical way. The siblings started having sex at the break of summer; since then, they hardly ever stopped. They walked around the house naked and fucked anywhere the urge struck them, often within earshot or in the full view of their mother!
And their mom actually *agreed* to this, tolerating and even condoning her kids having sex so openly. She considered it their journey of sexual exploration and discovery, which the cool mom wanted to be fully supportive of.
Needless to say, it had been a very memorable summer. But after living in this blissful sexual nirvana, the return to her usual college classes, even if she was now taking them remotely, was a tough ordeal for Katie. Her completely out-of-control libido, developed over the months of fucking her increasingly sexually adept brother, had a hard time coping with even just a couple of hours of academically motivated abstinence.
"Finally!" she let out, as the professor's monotonous voice announced the end of the lecture. "Last one for the day, and of course it had to be the most boring one!"
Sighing, she took the pruned hand out of her needy pussy and wiped the dredged-up juices over her flat, lightly muscled stomach. She closed the laptop and removed the earbuds, then lifted her bubbly butt and grabbed the wet towel she'd been sitting on. It was thoroughly soaked, mostly with her vaginal secretions, so she made a face and threw it straight in the hamper. For a moment she thought she'd heard a sound outside, but after several hours of listening to the droll voices in her ears Katie wasn't sure if it was real or not.
Once she opened the door to the hallway, though, she realized that the sound *was* real, and it was exactly what she'd thought it was. Now that she was hearing the full, orchestral version, it was extremely evident why Katie's earbuds had to be noise-canceling.
"Ooooh! Ooooh! Oooh!... Oh my god... Ethan, son... Yes! Fuck me! Fuck your mother, Ethan! Fuck her slutty pussy with your huge, hard, incredible cock!"
Yup, that was Katie's mom and brother. Judging by the pitch, intensity, and direction, it sounded like they were fucking somewhere downstairs, likely in the living room, and that they'd been going at it for a while now. The cadence of Mom's whimpers indicated that Ethan was probably thrusting into her with deep, full-length strokes of his unbelievable 10" shaft. He was shoving it in quickly, his sister thought, but taking his sweet time on the way out to tease and rub against his mother's sleek vaginal glove.
Katie could read all this from her mom's ecstatic cries, because this wasn't the first time by far that their mother was having sex with her kids. Living with the dynamite blonde daughter and her surprisingly capable brother -- both of whom had been doing nothing but fucking like bunnies, all over the house -- it took less than a week for their mom to discard all her inhibitions about incest. Then, after clearing up one little misunderstanding, their mother had finally joined the siblings in their sexual 'experiment', as she'd call it, and the three of them had been fucking ever since.
Yes, it had been a *very* memorable summer indeed.
Following the lurid noises, Katie descended the stairs and peeked into the living room. A raunchy smirk instantly crept upon her face, as she spied the ongoing debauchery that was taking place only a few feet ahead.
"Yeees, Ethan, fuck me! Yes, yes, don't stop... Don't stop, sweetie! Yes, I'm so close... I'm so... Oh my god, I'm gonna.... AAAAAAAAH!"
It was clear that Ethan had just brought his mom to another screaming orgasm. The delirious cry was wrought from her lungs by the savage thrusts of his massive cock, then prolonged into a wailing aria by those same ceaseless efforts of the strong, virile young man. The sight of their coupling was pornographically erotic; as she took it in fully, Katie couldn't help but gasp.
Their mother, Linda, was splayed obscenely on a large ottoman in the middle of the room. Head hanging beyond the edge, her large pendulous breasts swayed and flopped from the force of her son's strokes. She was getting absolutely railed by the fit teenage stud, who had put her meaty legs on his shoulders and was relentlessly thrusting his huge meatpole into the piping hot furnace between them. Thick thighs were bouncing him off, assisting his expert hip work, as he was fucking the curvaceous woman throughout her ongoing, thunderous climax.
"Shit," Katie cursed under her breath. "So, this is what I'm missing out on now..."
Linda's howls of pleasure went on for a good while. Sometimes, they'd take the form of some primal pseudo-words, which she'd shriek out frantically atop one of the many crests of her body-shaking orgasm. Those crude, practically animalistic noises soon abated, however, as they were replaced by the regular chant of broken yelps and moans that punctuated their continuing mating.
But shortly after his mom calmed down, Ethan also slowed down and eventually came to a halt. He decided to change things up for the next bout of their lurid tryst.
"Flip over, Mom!" he growled. "I wanna pound that tight pussy of yours from behind!"
Helped massively in this task by her son, the half-delirious Linda assumed a stance on all fours, with the large ottoman supporting the weight of her tiring body. The fleshy hemispheres of her expansive ass were right in front of Ethan now, and so he plunged his juice-slicked shaft back into his mother's gaping wet hole.
Then, he simply started fucking her all over again.
