Under the cover of darkness, a horny stepsister sneaks into her stepbrother's room, craving his thick cock. She mounts him in reverse cowgirl, her big ass slapping against his thighs as she grinds down, taking every inch. She's so turned on, she can't help but moan, even as he warns her to keep quiet. Her moans grow louder, more desperate, as she nears orgasm. She tries to muffle them with her pillow, but it's no use. She comes hard, her body shaking, her pussy pulsing around his cock. They finish with a fake cumshot, her body still trembling with aftershocks.