Stepsiblings got a babysitter to share after what happened last

The old adage, “Fool me once, shame on you; fool me twice, shame on me,” didn’t apply to the young siblings, John and Amy. After getting caught in a compromising situation with their previous babysitter, they foolishly decided to go for the same kind of thrill again with someone new. Little did they know, the new babysitter, Cassidy, was not only more tempting but also more daring than their last sitter.

John, a lanky 18-year-old with a mischievous glint in his eyes, had just finished his homework and was lounging on the couch when the doorbell rang. Amy, his 17-year-old sister, raced to the door, hoping with bated breath that the new babysitter would be a hottie like their last one. And to her surprise, Cassidy was even hotter.

Cassidy stood there in a tight pink tank top that hugged her ample breasts, and Daisy Dukes that accentuated her long, toned legs. Her platinum blonde hair fell in loose curls around her face, and her green eyes sparkled. “I must be at the right place,” she said with a slow, sultry drawl. “I’m Cassidy, your new babysitter.”

John whistled approvingly, earning a punch in the arm from Amy. “Knock it off, you perv,” she hissed under her breath before welcoming Cassidy inside.

As the evening wore on, the siblings kept finding reasons to be in the same room as their new sitter, casting flirtatious glances and laughing at her jokes. Cassidy seemed oblivious to their attention-craving antics at first, but she soon started zoning in on Amy, complimenting her cute outfit and saying how beautiful she looked from various angles.

John watched the growing intimacy with increasing irritation. He wanted the spotlight back on him, especially with such a smoking hot sitter. So, backed by liquid courage from the bottle of vodka he’d swiped from the liquor cabinet, he decided it was time to make his move.

He sauntered up behind the giggling girls and slid his hands around both their waists. “Hey, babes,” he murmured, nuzzling Amy’s neck while gazing at Cassidy. “Wanna get more comfortable?”

Cassidy bit her lip and looked from John to Amy. Amy felt her heart hammer in her chest. Was this really happening again? And with the hottest babysitter ever? She could almost taste how dangerous and wrong it was, but the allure was irresistible.

John tugged them towards the couch, slumping back as he pulled Amy into his lap and ran his hands up her thighs. Cassidy sat beside them, trailing a finger along John’s jaw before tangling her other hand in Amy’s hair and tilting her face for a searing kiss.

Amy moaned into Cassidy’s mouth, her head spinning. She could feel the hard bulge of her brother’s erection pressing against her bottom as she kissed the babysitter. John kneaded her breasts through her shirt, his breathing growing heavier.

“Fuck, that’s hot,” he muttered, watching Amy and Cassidy kiss with lidded eyes. “Ditch the clothes, you two. Let’s get properly acquainted.”

Cassidy stood and slowly shimmied out of her Daisy Dukes, revealing a lacy red thong that left little to the imagination. She pulled her tank top over her head next, unsnapping her bra to reveal full, perky breasts with dusky nipples. John practically drooled at the sight.

Amy followed suit, stripping off her sundress and underwear while Cassidy helped John to his feet. He shucked off his clothes, baring his eager erection. “Oh buddy,” Cassidy cooed, wrapping her hand around his shaft. “You’ve got a nice one here.”

John groaned low in his throat, his hips bucking into her touch. Amy watched them hungrily, running her hands over her own naked body as desire pooled between her legs. Seeing her stepbrother in the throes of pleasure turned her on like never before.

Cassidy shoved John back onto the couch and straddled his lap, grinding her bare pussy against his cock. He grabbed her hips, urging her on as he flicked his tongue over a stiff pink nipple. Amy snapped out of her lusty haze and practically pounced on Cassidy from behind, peppering her back and neck with heated kisses.

The babysitter groaned, arching into Amy’s touch while sinking down on John’s dick. Both siblings moaned in unison as their new playmate joined them in fornication, temporarily reborn as a sexual triangle of sin.

They stayed like that for a long, blissful moment, lost in each other’s naked flesh and the forbidden thrill of incestuous play. But soon, the fray was into full swing: Amy got to worship Cassidy’s chest while John buried his face between their sitter’s legs; the sitter 69’d with Amy, her mouth hot and talented on Amy’s clit as John pounded into them both from behind.

It was messy and animalistic, the air thick with grunts and moans and the musky scent of arousal. Amy came first, crying out sharply as her pussy clenched around her brother’s fingers. He followed seconds later, pulling out to spray thick ropes of cum all over the girls’ faces and chests.

Cassidy orgasmed hard, too, her juices flooding John’s hand and Amy’s mouth. The siblings helped clean her up, trading dirty kisses flavored with the babysitter’s essence. Exhausted, sated, they collapsed in a sweaty tangle, not caring that they were cousins and babysitter and step-siblings.

“Now I know how to really get you to calm down,” Cassidy teased breathlessly, making them all laugh with a giddy looseness, tinged with post-coital smugness.

John knew he should feel some pang of remorse, but the heady feel of bonding with his sister in the most intense way possible overrode everything else. And from the hazy, happy look on Amy’s face as she watched him and Cassidy kiss, he knew she felt the same.

This babysitter certainly knew how to keep her charges entertained. Next weekend couldn’t come fast enough. But for now, all could agree—it was probably best not to tell their parents about the slumber party part of their new arrangement.