The sister, hungry for more, takes charge. She unbuttons his shirt, revealing his toned physique, then pushes him back onto the bed. She undoes his belt, her hands trembling with anticipation. She takes him in her mouth, her tongue swirling around his length, while he grips her hair, guiding her movements. She moans, the vibrations sending waves of pleasure through him. He flips her onto her back, spreading her legs, and enters her, filling her completely. They move in sync, their bodies slick with sweat, as they chase their release, their moans and gasps filling the room.