On the couch, the siblings explore each other's bodies with newfound curiosity. She sucks his cock, taking it deep into her throat, her eyes watering as she gags. He pinches her nipples, making her squirm, her pussy dripping onto the couch. She pulls away, her breath ragged, and climbs onto his lap, impaling herself on his cock. She rides him, her tits bouncing, until he grabs her hips, slamming her down as he comes, filling her with his hot cum. She collapses onto his chest, her own orgasm ripping through her, their bodies slick with sweat and cum.