Julia never intended to cheat on her husband, Max, but when the chance came the petite redhead's way, she found confessing her indiscretions had its own advantages. It might not have been the conventional way to spice up their marriage, but it worked.
Her colleague, Tom, saw Julia out with another man and decided to blackmail her. Unbeknown to him, Julia had confessed to Max, so there was no hold over her. Julia, though, is intrigued by the implied submission, so, with Max's agreement, plays along.