Tricking Her Sister's Boyfriend

Zac Wild's all wrapped up with his girl Scarlett Bloom on the couch, whispering sweet nothings and stealing kisses like they're the last on earth. Her sister Kasey Miller lounges in the back, rolling her eyes so hard you can hear 'em creak. These two are disgustingly cute, always pawing at each other—it drives Kasey nuts. Especially 'cause she's been eye-fucking Zac for weeks, that sneaky little crush burning a hole in her panties. But then they start yapping about a steamy Nuru massage, and damn if Kasey's ears don't perk up, her mind racing with dirty possibilities. The lovebirds finally peel apart to set up the fun. Scarlett shoos Zac off to the bedroom. 'Strip down and wait for me, babe—oh, and grab that blindfold!' she calls with a wicked wink, plotting something extra filthy to blow his mind. But just as she's rounding up the gel and bowls, her phone buzzes like a pissed-off hornet. Urgent call from work or whatever—she hangs up, turns to Kasey with puppy eyes. 'Hey, sis, can you tell Zac I'll be gone like 20 minutes?' Kasey nods, playing it cool, but inside she's scheming like a fox in the henhouse. Scarlett bolts out the door, and Kasey snatches the bowl of slick Nuru gel, a sly grin splitting her face. She saunters to the bedroom, heart pounding. There's Zac, buck naked and blindfolded on the bed, cock already twitching in anticipation for his girl's touch. Kasey doesn't hesitate—she peels off her clothes, all curves and confidence, then climbs on, straddling his hips. She slathers that warm gel everywhere, gliding her perky tits and tight ass over his chest, his thighs, teasing every inch of him. Zac moans like a man possessed, thinking it's Scarlett's magic hands. 'More, baby, give me more,' he groans, bucking up into her slippery skin. Kasey bites her lip, keeping dead silent as she grinds and rubs, her pussy dripping with want. But when he begs for the real deal, she can't hold back—she lines him up and sinks right down onto his thick dick, that first stretch pulling a gasp from her throat. Zac freezes mid-thrust. 'Wait... that's not Scarlett's pussy!' The blindfold comes off in a flash, and there she is, Kasey Miller, riding him like she owns the joint, eyes locked on his with zero regret. Busted as hell, but Zac's too rock-hard and fog-brained to care. Girlfriend's sister? Screw it—they're both too fired up for a sloppy finish. 'Not a word to Scarlett,' he growls, flipping her over to pound away. 'Our dirty secret.' She nods, nails digging into his back as they chase that explosive release. Scarlett's grand plan? Out the window. But Zac? He's grinning like the cat that got the cream, loving every cheating second.