Who is Julia Wolf in the motion picture, The Thin Man?

Julia Wolf is Wynant's secretary and mistress; she is a major contributing factor in the breakup of Wynant's marriage to Mimi. Although she may have had feelings for Wynant at one time, she has grown weary of him and his compulsive work habits. She feels that she deserves more than she is getting from him, so she starts taking money from him in small amounts.