Our rooms have windows on the doors. We also insist on having other people in the building when bishop interviews children or women.
Personally, I’d opt to be just outside, and coach her on the questions before. I suspect this all comes down to the chastity question – the rest is not that inappropriate. Tell me if I’m wrong.
Looking at it from the other side, I’d imagine many bishops are uncomfortable asking this question. It’s an example of where the church tries to prevent problems – teen pregnancy, adultery, p addiction etc and gets it horribly wrong.