In a game of chance, this little sister loses big, betting her body against her stepbrother's. Now, she's bound by the rules of the game, forced to pleasure him. She starts with a massage, her oiled hands gliding over his muscular body, her big tits brushing against him. But he wants more. He lifts her onto his lap, her naked body straddling him, and she understands. She grinds against his hard cock, her wet pussy begging for it. He flips her over, her big ass in the air, and fucks her hard, her screams muffled by the pillow. He finishes inside her, her ass filled with his creamy load.