The “advice” that Nomi invents and attributes to Tash has always been important, but this time it’s especially clear that Nomi’s sister is indirectly influencing her to do the right thing. At the same time, Nomi’s declaration that she feels trapped at home by her sister’s decision to leave shows her understandable resentment of Tash’s actions, and suggests that her lack of self-confidence stems from a feeling of living in Tash’s shadow.