Breaking more than the rules

Your sister was slow but sure as she kissed you, savouring every moment, every second as she pushed herself into you, her towel shifting loosely on her body.

Your hands explored her hips and touched at her shoulders, venturing down to tease at her breasts. Didi gasped lightly into your mouth, parting from you gently, her head still pressed into yours "Don't do that unless you intend to do something about it." She teased gently.

"Maybe, if You behave, I will." You shot back, making her scowl gently, her body leaping out of the tub like a cheetah, her naked body unfurled from the towel as she clutched at your wrists fiercely

"Aww." She cooed, leaning into Your surprised self, lapping at You neck "I was hoping you'd let me be, very, very naughty...." she whispered, and You groaned feeling her hand grasp between your legs "Not that You'll have a choice" She winked.

You were burning, the skin on your face was hot with blood, feeling her slowly gyrating on top of you, her pert breasts glistening as she danced along your body alluringly.

But she wouldn't get to have all the fun!

Diana gasped, groaning deeply as You sunk your fingers inside of her cunt with a quick dexterity "May the Best, Warrior win." You grinned as she gritted her teeth a wild look in her eye.

"OH YOU ARE ON!" Sweeping down to kiss you, Your quickly rolled roughly with her petite body in your arms, pushing her against the bathroom floor with a thump as she **** her tongue into your mouth, the two of you writhing and spinning animalistically, until you grabbed her arm, roughly pushing her down into the ground so that her beautiful back end looked up at You "Ugh, if you wanted to rough me up all you had to do was ask." She smiled, her face buried into the ground.

You licked your lips, taking in the scent of her dripping cunny "Not that You'll have a choice."

She bit her lip "You smart ass-OH HOLY SHIT, OH MY GOD!"

Your tongue circled her clit, as two of your fingers slipped into her whole "Fuuuuck, it's been so fu-uh-cking looong, hmmmf." She moaned, feeling you spiralling and punching at her bean, Diana's toes curling and body flailing at the overstimulation.

"O-O-Oh fuck me, Chippy, you're already going to make me fucking cum if you keep doing that, ugh j-just wait a minute-Oooo fuck me with that cheeky little tongue, Big Bro!" She played into the fantasy even as her eyes crossed, body shimmering as a jet of warm clear girl-cum splashed against Your neck and chest.

But Didi was not done... not even close. Her eyes shimmered as they opened, her face contorting with lust as You felt this... odd, an animalistic spark between you.

OOooooOOO I haven't felt this little minx in a VERY LONG TIME!

Like a snake, she slithered around, pressing her paws into your chest and pulling you up "YOU ARE GOING TO CUNT PUNCH ME WITH THAT COCK, RIGHT NOW!" She growled, eyes wild as she shoved you against the wall, nearly winding you as she tightly grasped your hair, forcing you into another, much fiercer kiss.

You were burning up before, but now You felt like you were actually on fire. The Heat stirring something primal and monsterous inside you. You sunk your fingers into her sides, pushing her back against the wall in turn so hard that it cracked the tiles.

She smiled giddily, though melted as Your powerful fingers ensnared her nipples, twisting them harshly as she groaned in deep pleasure "STOP FUCKING ME AROUND AND FUCK ME!"

A Blow, hard and fast collided with your stomach, her boots sending you reeling back into the bath that cracked unto your weight, completely ruining it as You lay there in a daze.

Like a dark beast, your sister swept in, hurriedly tugging and tearing at your belt buckle until you cock was unleashed "AHA! THERE'S MY LITTLE TOY-AH!"

Flying up from the ruined bath, you grabbed her again, forcing her down unto the toilet at cracked against the ****. Pushing your length against her opening, Diana revelled in the feeling "THAT'S RIGHT, FUCK YOUR LITTLE SISTER, FUCK ME RAW!"

You heard the lady, get on with it!!

Inhaling, you felt your head press into her soft, tight little cunt, her glistening opening welcoming you in as You slipped past the threshold, forcing more and more of your cock into her magenta depths until she screamed out in pleasure "FUUUUUCK, HMMMMMF, OH SWEET JESUS!" She sighed, fingers crushing into the already cracked tank.

"You're mine, you slippery little bitch!" You growled, pulling out and thumping hard back into her wound, making her shriek with joy.

"FUCKING RUT ME THEN, ASSHOLE!-SHIIIT MY POOR LITTLE PUSSY, I WAS ONLY KISSING-*GASP* CHIPPYYYY UUGH!" A quick one-two, in and out, sliding perfectly in and out to test her will.

But after that, it was free game, and you began to thrust powerfully into her dripping cunt, harshly pushing her down unto the loosening toilet seat that she held unto for dear life, high pitched concurrent yelps leaping from her jaws as you fucked her into oblivion.

"BEAT IT UP, FUCKING RUIN ME, FUCKING CUM IN ME LIKE I'M TRASH!" She cried, forcing her hips back into yours, hitting you deeper into her spasming cunt that seemed to never cease in it's cumming.

You were getting close yourself, Diana pushing you back into the ground, ruining the tiles once more as she desperately rode you, fast and hard her hips moved as she stared deep into your eyes, in a moment of lucidity "Please cum inside me, chippy, please."

WE ARE HAPPY TO OBLIGE

Gasping and growling, you felt your climax come, Your eyes smouldering as You grasped at her arm "CUM AGAIN!" You cried.

"WHAT?" She asked.

Your mind linked with hers, your will becoming iron "I said cum!"

Diana shook violently, looking a little confused, her pussy clenching hard in climax "Cum again!"

Your sister vibrated, her eyes rolling back in her face as she slid into another orgasm "OoOoOoH FUCK CHARLIE, WHAT ARE YOU DOING TO ME!?" her voice drowned out by her rabid cumming.

"CUM AGAIN, CUM FOR YOUR BIG BRO!"

Screaming as a waterfall of juices shot out her cunt, You hilted deep inside filling her up with your semen, drowning her room as you both slumped into the ground, sweating and lost in you afterglow.

Diana's body... began to stretch, moving and growing until... a fully sized Diana lay half-**** on your chest, You chuckled, looking around the ruined bathroom "Broke more than the rules." You whispered as your big sister nuzzled into your chest.