Sneaking into her stepbrother's room, the bossy teen finds him masturbating to her lingerie. Caught red-handed, he's ordered to assume a submissive stance. She revels in her power, making him service her body, her voice laced with command. 'Call me big sis,' she demands, 'and worship my pussy like the good little brother you are.' Their taboo game of domination and submission unfolds, each boundary pushed, each rule bent.