Stepbrother With Benefits (19 page)

With Jack’s lust at an all-time high and his normal inhibitions pushed far into the background, the longer he thought about it, the more enticing the idea became. “I... well... would it make you happy, sis?”

“Being with
you
is what makes me happy, Jack. Mark would just be the icing on top of an already delicious cake. So... maybe we can do it just this one time?”

“Hell, I can live with that!” exclaimed Mark – taking her words as permission to continue. In a flash he was undressed, his cock sticking out almost perfectly straight from his skinny body and looking for the world like a purple-headed spear ready to stab into Ellie’s perfect ass.

Picturing that distressing mental image prompted Jack to shiver with discomfort – something his sister must have mistaken for excitement, because she started giggling. Ellie seemed completely thrilled!

Unsurprisingly, Mark knew exactly what he was doing. Approaching the couch with his cock waving comically in front of him and his heavy balls jangling between his legs, Mark climbed on the cushion and straddled the couple’s interlocked legs. Even though Jack couldn’t see anything from below Ellie, he could feel the pressure from Mark’s knees inching forwards on the cushion, followed by the warmth of the teen’s hairy legs brushing against his thighs.

“Oh my god...” groaned Mark. “El, your little asshole is like the most beautiful thing I’ve ever seen!”

Ellie snorted. “You know, I’d like to think I have
much
better places to look on me.”

Jack heard Mark work up some spit, followed by the sensation of wet fingertips brushing against the root of his own penetrating cock.

This casual and yet highly intimate touch gave Jack pause: just how “familiar” were he and Mark going to get?

As Mark adjusted his position, Jack studied his sister’s excited-looking face like a scholar studying a masterwork. He could tell the exact moment that Mark’s cock pierced Ellie’s asshole, by the way her mouth fell open and her eyes glazed over... not to mention, the way her pussy clenched violently around his own cock.

“Damn baby, your ass is really fuckin’ tight,” moaned Mark under his breath. “But I get the feelin’ someone’s been messing about in here before me!”

“Yeah, um... Jack already got the honor of popping that particular cherry just before you got here,” she replied with a snigger. “And it was a hell of a lot of work! But you’re a close number two.”

“Lucky, lucky man,” commented Mark, gleefully slapping the side of Ellie’s ass as he shoved deeper.

Ellie gasped at the sudden increase in penetration. “Fuck, fuck, fuck!” she swore through clenched, obviously uncomfortable with how quickly Mark was proceeding.

Holding Ellie’s hips, Mark rocked her body back and forth several inches, managing to fuck her on both embedded cocks at the same time. After a few minutes, when it seemed like Ellie was accustomed to and even beginning to enjoy the sensation of double penetration, he increased his tempo and force, working himself further inside with every thrust.

To his surprise, Jack discovered that he could tell exactly where Mark’s cock was inside Ellie’s ass, from a gentle pressure transmitted through the thin wall separating them. It was both highly arousing... and intensely disturbing at the same time.

Ellie groaned and began whining impatiently. “C’mon, Mark,” she coaxed. “Jack got in way deeper than that!”

Stopping abruptly and repositioning his knees, Mark grabbed Ellie’s hips and hurriedly drove himself full-depth, groaning with pleasure as Ellie’s interior muscles convulsed around both men. He then began fucking Ellie in earnest, giving Jack something of a shock when the randy teen’s pendulous ball sack slammed against the sensitive underside of his own cock – and not just once, but every time he rammed home against Ellie’s ass.

Jack hadn’t figured on having to feel
any
part of Mark – especially
that
part – but quickly reasoned that female anatomy placed the two of them so close together, that such intimate contact was going to be unavoidable.

Ah well; when in Rome...
he thought to himself with a sigh of acceptance.

Wrapping his hands under Ellie’s thighs, Jack began helping the three of them get into a steadier rhythm.

Ellie groaned and sucked on her lower lip. “Holy fuck, guys... I can’t believe how insanely full I feel!” she cried, her fingernails digging into Jack’s shoulders as she braced herself against the double onslaught.

Mark growled and leaned back, slapping Ellie across the ass with both hands. “Fuck, girl... you’ve got me so worked up, I think you’re gonna feel even
fuller
in a minute!”

Jack knew exactly what Mark was hinting at. He probably should’ve been at least mildly concerned that someone he barely knew might be planning on ejaculating inside his sister... but he was so horny at that moment, that he actually looked forward to it happening!

Catching himself thinking these wicked thoughts, Jack shuddered and shook his head. Just what had happened to him over the past few days of living with Ellie and her roommates? He was normally such a demure guy – he hadn’t even acted this depraved in college!

Leaning forwards, Mark slid his hands between Jack and Ellie’s chests, wrapping his fingers around the girl’s large breasts and bending her body back towards him. Ellie’s spine curved in reverse as Mark used her weight as a counterbalance to his own; drawing his cock nearly all the way out her ass and then rapidly pounding back inside, like a human pile driver.

Ellie shrieked as though she were being split in two on every plunge, her face flushed bright red and dripping with sweat. The brutal force of Mark’s lustful fucking caused her knees to gradually spread, driving her hips lower and lower and reducing the already miniscule gap between her anus and vagina to nearly nothing... which is when Jack felt the decidedly wet underside of Neil’s cock drag along his own.

Mark didn’t seem to care about this highly inappropriate male-on-male genital contact, and kept thrusting smoothly against him. Jack wanted to yell out for the guy to watch where he was putting that thing, but the look of exquisite pleasure fixed on Ellie’s face gave him pause, and he reluctantly held his tongue. All he wanted is for his sister to be happy, and if this is what it took...

As if reading his thoughts, Ellie’s mouth fell open and she let out a deep, gurgling groan of carnal ecstasy; a stream of drool escaping her lips and landing on Jack’s chest. She was really into this!

From behind, Mark grunted and braced himself against the couch with one hand as he thrust into Ellie with short, rapid strokes; his other hand squeezing her breast so hard it looked like the shiny red nipple might pop right off.

“Fuck, El, can I come in you?” hissed Mark through clenched teeth.

Ellie was so lost in her own world of pleasure, that it took a few seconds before she realized that someone was speaking to her. “Of... of course,” she answered hoarsely.

Jack didn’t like the sound of that.

Pulling back, Mark plunged his cock all the way inside Ellie’s ass with a groan of relief, the violent thrust not only causing her to let out a croaking gasp, but the transferred force even managing to knock the wind out of Jack below.

Mark pulled his hips back and drove into Ellie a second time with all his might, shoving her body so far forward that her pussy slipped halfway off Jack’s cock. He felt his sister’s vaginal muscles clench tightly around him, as if attempting to hold him inside... but then Mark plowed into Ellie’s ass one final, brutal time, and Jack fell out entirely. Mark pressed his full weight on top of the teen, flattening out her buttocks and wedging his cock deep as he reached a moaning, shuddering orgasm.

With Mark’s fingers twisting and pulling on Ellie’s nipple, she let out a piercing scream at the exact same moment as a sudden hot burst of liquid washed over Jack’s groin. With surprise, he realized that his sister was coming, yet again... squirting the proof of her sexual satisfaction between her two partners, while Mark injected load after sticky load of cum into her ass.

By the time that they were both finished, the couch beneath Jack was back to soaking wet. Ellie shivered, collapsing on her brother and sucking in gasping lungfuls of air as she fought to catch her breath.

A few seconds later, she broke out in a fit of girlish giggles, thoroughly overjoyed at reaching her third orgasm of the night. “Oh wow, that was just... like just
super!”

Mark moaned from on the top of the human dog pile. “Fuck, El! Your damn pussy juiced all over us!” he exclaimed incredulously. “Since when were you a fuckin’
squirter?”

Basking in afterglow, Ellie continued giggling happily. “Oh, you know about that kinda thing, huh? Yeah, that’s what I was talking about earlier... Jack taught me how to get off even better, but it makes this like
huge
mess!”

Ellie kissed her brother passionately on the lips in gratitude. Jack knew the statement about his involvement wasn’t exactly accurate, but he was more than happy to take the credit.

“Geez. That’s too hot, El! Can you control when it happens?”

“I don’t think so – it kinda just comes out on its own... but it feels absolutely heavenly when it does! Although this is only the second time it’s happened.”

“Well babe, if you can keep on squirtin’ like that, I swear you’re gonna be a fuckin’ star on campus!” Straightening up, Mark quickly withdrew from Ellie’s ass, the mushroom head of his cock making an audible popping sound as it cleared her sphincter.

Ellie sighed and draped herself over Jack. “Thanks Mark... I think. It was really neat feeling you both in me all at once.”

“I hope it’s not going to be the last time, babe.”

“Mmm, we might just have to see about that.” Still giggling, Ellie reached behind her back and rubbed at her ass. “You know... Beth and Rachel always say it feels like you shoot a gallon of jizz in them... and I can believe it now! Still, from what I’ve seen, you might have to up your game if you wanna beat Jack here.”

“Oh really?”

Jack was about to comment on his reported prowess, when he heard a soft sputtering noise and then felt something very odd: a river of molten hot liquid, flowing right over his cock and spreading across his groin.

Oh fuck – that has to be Mark’s cum!
he thought to himself in abject horror.

“Shit, El – keep doing that! You’re pushing my cum on your brother!”

Ellie must have seen the distraught expression on Jack’s face, because she immediately silenced any possible protest with a sloppy, open-mouthed kiss... and some rather nimble tongue acrobatics. Rocking her butt against him, she groaned into his mouth as yet another surge of Mark’s fluids sputtered out.

God, that guy really does make a lot of cum,
thought Jack grimly. Even on the pill, it was a miracle that Rachel and Beth hadn’t been knocked up long ago!

“Jeez, that’s too fuckin’ hot!” exclaimed Mark. “I can’t believe we’re not getting this kinky shit on video. There’s websites out there that’ll pay ten thousand bucks for stuff like this!”

As Ellie continued kissing her brother, a hand wrapped around Jack’s painfully hard cock and lifted it against her dripping wet pussy. Only... both of Ellie’s hands were already occupied around Jack’s shoulders.

Mark!? Damn it, man!
grumbled Jack to himself in annoyance, but unexpectedly little repulsion. What’s with that guy and his total lack of personal boundaries?

Mark, clearly emboldened with lust, lined up their genitals and gave Ellie’s ass a shove backwards, driving her pussy an inch or two onto Jack’s cock.

“There,” he said smugly. “Now the debauchery can resume!”

Breaking the kiss, Ellie whispered in her brother’s ear. “See, Jack? I told you this’d be hot.”

“Not to mention extremely uncomfortable,” he whispered back. “You never mentioned how grabby Mark was.”

Sitting upright, Ellie wiggled her hips and impaled herself on Jack, her pussy making insistent clenching motions as she settled.

“Your cock doesn’t feel like it’s all that uncomfortable to me,” she remarked, hunching up and down slowly.

It was around this time when Jack remembered Mark’s cum on his cock... and that now, each time he drove into Ellie, he was only helping drive her roommate’s fertile seed deeper towards her potentially vulnerable womb.

Instead of this angering, scaring, or even disgusting jack, it only energized his darkest urges. He had to do something about it. With a sudden burst of energy, he growled and grabbed Ellie’s ass, yanking her body downwards at the same time as he shoved his hips upwards, spearing her full-depth in one fierce and unpredictable motion.

Ellie shrieked and threw her head back, grabbing her breasts and mashing them together. “Oh god, yes! Fuck me, Jack! Show Mark how hard you fuck your little sister!”

Where the hell did Ellie get that kinky side from?

With a tight grip around Ellie’s buttocks, Jack repeatedly impaled the screaming girl on his seething cock, pulling her pussy almost completely off before brutally shoving her down and slamming their cum-soaked sexes together, over and over and over again. Based on the rising tension in his groin, he wasn’t going to last much longer!