Creep

Dr. Sheila Tao is a professor of psychology, an expert in human behavior with her own hidden past. When she begins an affair with her sexy graduate assistant Ethan Wolfe, she knows she's playing with fire. Consumed by lust when they're together, she's riddled with guilt when they're apart. Now she's finally engaged to a good man, and it's time to end the dangerous liaison. But Ethan has something different in mind. He intends to make her pay for rejecting him.