As the door clicks shut, sealing them in their secret world, the siblings give in to their taboo cravings. Clothes are hastily discarded, revealing the curves and lines they've long denied themselves. They're a tangle of limbs, their bodies slick with sweat and desire as they indulge in the carnal dance, their cries of ecstasy muffled by the thin walls, their secret safe within the closet's embrace.