Harlow West, the young pornstar, finds herself in a predicament with her stepbrother. After a playful tussle, he holds her down, his erection evident. 'You're not laughing now, are you, Sis?' he taunts, rubbing against her. Harlow, her heart racing, feels a surge of excitement. She's always had a forbidden desire for her stepbrother, and now it's coming to life. But will they succumb to their taboo urges, or will they stop before they cross the line?