Course Hero. "The Girl on the Train Study Guide." Course Hero. 3 Aug. 2017. Web. 13 Dec. 2018. <https://www.coursehero.com/lit/The-Girl-on-the-Train/>.
Course Hero. (2017, August 3). The Girl on the Train Study Guide. In Course Hero. Retrieved December 13, 2018, from https://www.coursehero.com/lit/The-Girl-on-the-Train/
(Course Hero, 2017)
Course Hero. "The Girl on the Train Study Guide." August 3, 2017. Accessed December 13, 2018. https://www.coursehero.com/lit/The-Girl-on-the-Train/.
Course Hero, "The Girl on the Train Study Guide," August 3, 2017, accessed December 13, 2018, https://www.coursehero.com/lit/The-Girl-on-the-Train/.
Upstairs Anna contemplates a life without Rachel, which seems within her grasp because Tom is about to kill Rachel. When she realizes that she'd never be safe because Tom would never trust her and because another Megan or Anna might come around, she goes back downstairs. They share a beer, and Tom promises to make everything up to her, while Rachel lies on the floor, unconscious. She says she will forgive him. When Rachel wakes up, Tom sends Anna back upstairs, but she takes the hallway phone and sits on the bottom of the stairs, waiting.
Anna still considers Rachel the enemy rather than Tom, and seriously contemplates the upsides of Rachel's death at Tom's hand. Only when she realizes that Tom might never fully trust her because she knows too much and that killing Rachel does not guarantee that no other woman will come along to threaten her family, does she consider taking action and goes back downstairs. Once downstairs she seems to side with Tom yet again, and the reader is never quite sure whether she is just biding her time or whether she is really still looking for ways to preserve the facade of a happy family. Tom and Anna really are made for each other, each of them looking out only for their own benefit, willing to destroy anything and anyone in their way.