The son of her sister, who married internationally, came to Japan temporarily to continue his studies and ended up staying at Marina and her husband's house. Reuniting after eight years, her nephew had grown into a handsome half-black man, and of course, his cock was mega-sized. After catching sight of her nephew's monstrously erect dick, Marina couldn't suppress her desires and, as he demanded, became immersed in forbidden incestuous mating...!!