To what question does Julia say, "No," in 1984 by George Orwell?

I am assuming that this is a question for Part 2, Chapter 8 of the novel 1984. If so, this part takes place when Julia and Winston come to O'Brien's flat to pledge their interest in working for the Brotherhood (the rebellious group that plans to go against the Party). To test their commitment and resolve, O'Brien asks Winston and Julia several questions, including whether they would be prepared to give their lives for the Brotherhood and whether they would be willing to murder for the greater good of their cause. Winston answers for himself and Julia when he says yes. When O'Brien asks whether Winston and Julia are willing never to see one another again, for the cause, Julia answers no, and Winston agrees.