As Jeff ponders, his young little sister comes into the bedroom. The nude 8 year old child was dripping pussy juices as she walks to the bed. "Big brother? Can we have sex?"
"Sure, you're my favorite little slut anyway." Jeff said, sitting up. She crawls onto him and starts sucking his dick while playing with his balls. She was skilled for such a young age, having had plenty of practice already. Her tongue moves faster and faster, slurping up his cock, licking up the precum which oozes from his tip, then sliding back down to his base.
"Mmmm fuck this is the best blowjob I ever had." Jeff softly moans, gently placing a hand on top of the little sister's head to keep her going. "I love your sweet little mouth..."
The girl giggles as she sucks. Her lips slide down his shaft until it disappears between her pink lips, where it slowly reappears, coated in saliva and cum. As soon as it appears, she slides down, engulfing all of his member within her tight throat. After a few seconds of deepthroating him, she pops her 17 year old brother's cock out of her mouth with a gasp.
"Damn you're fucking good, Sarah." Jeff said with a soft groan, embracing this once taboo in the old reality that was now normal in this alternate one. "Straddle my cock and ride me."
Sarah does as instructed, straddling his waist with her ass. His hands grab both of her buttcheeks, spreading them apart. She rubs herself against him, rubbing the tip of his dick along her wet slit, eliciting a moan from her as she rides his lap. Soon enough, she lowers her hips and impales herself on his dick, moaning as it fills her completely.
"O-Oohhhh!" She starts moaning like a whore, riding his dick. She bounces up and down, her small petite body looking magical in those motions. "Yesss! Yeesss fuck fuck fuuuccckkk!!"
She suddenly stops bouncing, gasping for breath. She lifts off his cock, her legs shaking as she tries to catch her breath. A few minutes later, she impales the cock into her cunny and starts bouncing again. "Fuck! Fuck fuck fuck fuck fuck fuck fuck!"
"Ohh yes..Ohh yeah keep riding my dick, Sarah...Ohhh fuck yeah you're such a good slut!" Jeff moans, resting his head back on a pillow. His cock was sliding in and out of her tight, wet pussy it was a feeling he never felt before. He felt like he could get addicted to it.
Soon after, Jeff's orgasm begins. "Ughhh fuck I'm gonna cum!" He grunts, thrusting into her harder. Her tight cunt squeezes him tightly, milking his dick as his seed spills forth. He feels every spurt inside her, making sure he gets everything out of him. When he's done, Sarah pulls out to hover above him, letting some of the spunk of semen drip out of her underage mound before laying on top of him.
Jeff kisses her forehead, stroking her hair. "That was amazing, sis." He whispers. She blushes lightly. "You wanna sleep with me tonight?" He asks, holding her close. "We can have sex all night long~"
Her cheeks darken further, nodding. Jeff smiles at her cute face and embraces her, pulling her into his arms.