Screwing Cindy's Brains Out

“Let’s see, how should I word this one…” Jack mumbled to himself, taking a moment to put his thoughts together. “I wish that everyone in the world had bodies with elastic properties and were able to stretch beyond their limits without getting damaged, while retaining any and all tightness during and afterwards, and none of us can feel pain… Also, I wish your tits would grow to the size of watermelons and become super sensitive.”

Jack blinked once, and Cindy just cocked her head at her sexy step-brother’s nerdily-worded wish in confusion, not having enough time to truly process what that meant before he blinked a second time, flipping her entire world upside down in the span of a single second.

“W-wait, whaAAHH!”

Cindy’s perky, C-cup-size breasts exploded with growth, pushing her crossed arms away and knocking her off balance due to the drastic shift of weight on her slender body, causing the blonde to stumble a bit and slip, and she fell down onto her pert rear.

Normally, a fall like that would’ve hurt like hell, but somehow it was if the bones in her butt were made of a firm and sturdy rubber, and she even lightly bounced a few times as their molecular structure softened and rehardened on the impacts. That aspect of the moment was quickly forgotten and overshadowed by the intense feeling of suddenly having a pair of extremely heavy tits, each of them larger than her head and sloshing around on her chest like two huge water balloons that were filled to the absolute brim. They always seemed to be moving, and were so full that it almost looked like she’d suddenly gotten gigantic implants. When her hands slowly reached forward to touch and examine her massive mammaries, she was rewarded with a roaring rush of pleasure that flowed up through her spine on contact, and then Cindy dug her fingers deep into their insanely plush flesh, instantly beginning to moan and squeak like the mindless nympho she was gradually becoming.

“Holy fucking shit, Jack…” Her face twisted and contorted into adorably awkward expressions of lust and euphoria as the tone in her voice was all over the place. Animalistic, even. “Holy goddamn mother of fu-huh-ucking shit, this feels so fucking good… Ohhhmyyygaawwd…”

Beaming with excitement and disbelief, Jack gazed down and watched Cindy’s lewd display with a slack-jawed expression, his cock ready to burst from the sight of what had just happened as he pumped away at it with his right hand.

Before he knew it, he was groaning as his legs began to tremble and become weak, rope after rope of seed spurting out from the tip of his big cock and down onto Cindy’s ridiculously big tits. She looked up at him through the haze of pleasure that she was experiencing herself, just in time to see him busting a nut. The literal pint of cum he let loose felt hot as it landed on her tits’ sensitive flesh, and Cindy shivered and moaned with delight at the insane, perverted things that she was bearing witness to. The amount was plentiful, every ounce of it was thick and sticky, and each second that the mind-numbing ecstasy dragged on only reinforced Jack’s deep-rooted ambitions for wanting to do nothing with his life aside from living comfortably and cumming as much as possible.

By the time Jack’s breathtaking, half-minute-long orgasm had ended, Cindy had reached forward and grabbed ahold of her nipples as a test-feel, collapsing onto her back in the shower as she had a powerful orgasm of her own. She laid there twitching and trembling with the widest of smiles on her face and the sexiest of sounds escaping her open lips. Jack stood only a couple of feet away from her and was heavily panting as he recovered, one hand rubbing out the last of his load while the other was gently messaging and juggling his huge balls, actually feeling them noticeably swell up and grow while they quickly refilled with another thick batch of baby-gravy.

Jesus, he thought, amazed at how fast his cock had recovered, and especially at how absolutely ready he was ready to go again. Jack sighed with satisfaction, gazing down at Cindy as she helplessly squirmed around on the floor, overtaken by the seemingly endless waves of pleasure flowing through the electrified nerve endings of her anime-tier tiddies. With a chuckle, the horny teen got down on his knees as he watched the ocean of titsflesh slosh and jiggle on top of Cindy. With her legs bent and knees in the air, Jack placed his hands on each one and spread them apart, revealing her perfect, juicy pussy. He lined his cock up towards her hole’s tight entrance, and Cindy gasped in genuine surprise when its thick, twitching head pressed against her mound.

“I wish the bathroom was soundproof.” Jack said, then grunted as he pushed his mighty cock between Cindy’s plump pussy lips. “And th-that the show-oh, oh fuck… that the shower can’t run out of hot water.”

Jack wasn’t exactly sure what to expect, having been a total virgin just only a literal second ago, but what followed after penetrating his cunty step-sister was unreal. Thanks to his “elastic bodies” wish, he supposed, Cindy’s incredibly tight pussy didn’t offer much of any resistance to his long and very thick cock. In fact, it almost seemed to pull him in, and when he eventually bottomed out in her stretchy cunt, he buried his pelvis against hers, his torso hovering over a pair of giant tits being that were still being mauled by the wailing slut they were attacked to.

“Ooh, f-fuck!” Cindy cried out in one of the highest pitches that she could produce, her entire body locking up then convulsing as Jack slid into her. Something in her mind broke once her brother’s fat hog reached into areas that shouldn’t be possible to reach, feeling as though he had pushed and was stretching the walls of her cunt up all the way up into her upper-abdomen. The thing was, though, none of it pained Cindy in the slightest. The only thing she was able to experience was raw, unyielding pleasure by the time their crotches met, and the overwhelming sensations doubled in intensity once Jack’s large hands pushed away her own and roughly grabbed ahold of her oversized milk-tanks.

“Goddamn, Cindy!” Jack groaned as he slowly pulled out the majority of his cock, just before ramming it back into her completely, his hands actively manhandling her amazing breasts the entire time, utterly blown away by how soft and smooth and slippery they were. “Your pussy really likes this big fucking dick, doesn’t it?” He pulled back again, pumped his giant inside once more, then repeated the process, his pace increasing steadily. “That’s good, because I’m loving the way that your pussy keeps pulling it back in for more.”

Before long, the only sounds that could be heard reflecting off of the tiled floor and walls of the shower were the crisp slaps of flesh against flesh and the endless, high-pitched moans and curses of a young woman who was wholly lost to unbridled lust and a constant barrage of mind-melting orgasms crashing all through her system, all while a fresh, steamy, mid-pressure flow of hot water rained down on the pair of siblings’ slick, shiny bodies. It didn’t take long for Jack’s overflowing balls and huge dick to tense up and explode with another batch of thick seed into the back of her tight cunt as he slammed into her one last time. It was in this moment, Jack realized just how fucking good it felt to actually cum inside of a tight pussy instead of in his hand or a dirty sock.

Cindy seemed to be done by that point. Her moans were much weaker than before as her brother's spunk was pumped into her belly, and her arms and legs had almost gone completely limp while her eyes seemingly rolled back in their sockets. When Jack’s minute-long orgasm finally ended, Cindy closed her eyes and her head slightly tilted to the side as she fell ****.

Once the post-nut clarity hit Jack, he opened his eyes and looked down at the sight before him with an unsettling chill flowing up his spine, then shivered hard as he pulled his still-erect prick out of Cindy’s elastic cunt. After that, he managed to pull his hands off of her big tits, two red marks left behind on each of them from where his hands had been tightly squeezing them as they jiggled and sloshed around on top of her for a short time afterwards.

Leaning back against the wall and panting heavily, he simply thought of his genie for the briefest of moments while watching his thick goo leak out of Cindy’s pussy, and she suddenly appeared sitting next to him with her legs crossed.

“Don’t worry Jack, she’ll be fine.”