The strict religious upbringing of this "shotinho" sister has left her starving for touch, her "buceta" aching for the forbidden. Her brother, always the protective one, finds himself torn between his duty and his desire. As she confides in him, her body betraying her with every shiver and flushed cheek, he struggles to keep his promise to their parents while his cock throbs in response to her unspoken needs. Their taboo dance continues, a dangerous game of temptation and denial.