I suspect that those who are born in, as I was, are kept there because they feel safe. Its the only social circle they've ever known. Where else would they go? The big bad evil world?
Why not attempt to make some friends with some nice moral worldly couples and gently integrate them into your social circle, thus helping her to see the big bad evil world isn't at all like the society paints it to be. Then it will be easier for her to let go gradually, just fade into the background and escape without her even knowing it? She would replace the void the society fills for her and she wouldn't need it anymore.
Just an idea.