In the dimly lit room, Michelle and her brother find themselves alone, their curiosity piqued. He's always admired her curves, and she's noticed his growing bulge. With a playful smile, Michelle straddles him, grinding her ass against his hardening cock. He groans, gripping her hips as she reaches back to stroke his length through his pants. 'You've got a big one, bro,' she teases, feeling it pulse against her. He flips her over, pulling down her panties, and slides his thick cock inside her, making her gasp.