After having not only listened
to the book (I have it on an audible player), and reading it more than 5 times in the last year, you pick up on the whole of the intent. No one actually escapes the tortures and the brain washing in Winstons time. Anyone who is not a 'goodthinker' or "orthadox" will eventually be removed, as the party's sole purpose is not to teach, but to supress any kind of Freethinking.
If you pay close attention to what she says, she makes it very clear that she went through some form of torture, including her own stint in room 101.
'Sometimes,' she said,'they threaten you with something -- something you can't stand up to, can't even think about. And then you say, "Don't do it to me, do it to somebody else, do it to So-and-so." And perhaps you might pretend, afterwards, that it was only a trick and that you just said it to make them stop and didn't really mean it. But that isn't true. At the time when it happens you do mean it. You think there's no other way of saving yourself, and you're quite ready to save yourself that way. You want it to happen to the other person. You don't give a damn what they suffer. All you care about is yourself.'
'All you care about is yourself,' he echoed.
The author is showing that he and she understand each other; they have suffered through the same thing, but they were not drawn together, they were torn apart. It is not stated outright, it is simply inferred, and from what you you know of winston and O'brian, there is no doubt they made her suffer.
