She is their queen, mate, and love of life. She is to keep them together and controlled; all seven of them needed her. Gluttony; Pride; Wrath; Sloth; Greed; Envy; and Lust. The only thing is, she isn't completing her job as queen, because she doesn't know. She has no idea that she is the queen to all seven kings of The Seven Deadly Sins. She is me. 

She needed a job desperately and he was there to save the day. If only she knew what type of job he had in store. Working at a brothel as the "" was not what she was expecting.