Mom's clueless, but the tension between 'S' and 'N' is palpable. 'S' sneaks into 'N's room, finding him jerking off. She joins him, their hands entwined on his cock. 'N' tastes 'S's sweet nectar, then bends her over, plunging deep. 'S' claws at the sheets, biting her lip to stifle screams. 'N' pounds harder, his balls slapping 'S's ass. Suddenly, they hear Mom's footsteps. They freeze, hearts pounding, as Mom passes by, unaware of their forbidden game.