Mildred is quite happy with her life of distraction. She takes more interest in the parlour shows than she does with Montag or anything significant in the outside world. When Montag rebels, she wants no part of it. Even when Montag decides to take a day off of work, she doesn't approve. After Beatty leaves their house, Montag tells Mildred he is not going to work and he might even start reading books. Her response is "I'm tired of listening to this junk." When Montag reveals the books he's been hiding, she quickly tries to burn them.
In Part 2, Mildred's friends come over one evening to watch a show. Montag decides to read "Dover Beach." Mildred tries desperately to divert everyone's attention back to the "family" (the people of the parlour show).
In Part 3, Beatty and the firemen take Montag back to his house to burn it. Mildred is seen running from the house with a suitcase. Montag asks Beatty if Mildred is the one who turned him in. Beatty says her friends did first and he let that slide. But then Mildred did turn him in. She is so opposed to change and Montag's rebellion that she eventually pulls the alarm.