As their father's voice echoes outside, the siblings freeze, their hearts pounding. The sister, her eyes wide with fear and excitement, guides her brother's cock to her entrance. She's a virgin, untouched, but the hunger in her eyes is unmistakable. She sinks down, her tight pussy stretching to accommodate his thickness. Their bodies move in a rhythm that's equal parts lust and penance, their moans muffled by kisses. The closet fills with the scent of sex and the sound of their bodies slapping together. As they reach their peak, they cling to each other, their bodies shaking with release and the weight of their taboo act.