In a desperate attempt to maintain their chastity, the siblings resort to mutual masturbation, their hands flying over their bodies. But their lust is insatiable. The brother's massive, veiny black cock strains against his pants, while the sister's fingers plunge in and out of her slick, needy cunt. Unable to resist, they shed their clothes, revealing their naked, quivering bodies. The sister's eyes widen as she takes in her brother's enormous cock, her mouth watering with desire. She leans in, her tongue flicking out to taste the pre-cum beading at the tip, before taking him deep into her throat. The brother groans, his hands tangling in her hair as he guides her head up and down, fucking her mouth with abandon.