Of course the interrogation chambers can't work 24/7. The poor guys need rest, and the girls last longer that way. It's important to have a comfortable place for her to wait between sessions
It can be efficient to take breaks without removing her from the position that seems to motivate her, so you can get right back to work without wasting time when the break is over.
The women do everything they can imagine to avoid returning to screaming pain which they can't end (sometimes they just don't know. Suggesting at alternative, like a blowjob, is difficult when gagged, but she can get the idea across.