Framed by the dim glow of a Brazilian sunset, an incestuous dance unfolds. A brother and sister, both in their late teens, find themselves alone in their small apartment. The sister, her eyes smoldering with a newfound hunger, initiates the forbidden dance. She traces patterns on her brother's bare chest, her fingers lingering, before she leans in, her breath hot on his ear. "I've been thinking about this," she whispers, her voice thick with desire. He swallows hard, his body responding, as she takes his hand and places it on her thigh, guiding it upwards, her eyes never leaving his.