As soon as she said "can't we get someone to do it for us?" I was like "it's slave time, isn't it?" and sure enough, looks like it's slave time.
Also very surprised Segrit didn't try anything when he was in the boss room to interfere. I thought it was pretty dumb of them to let the guy in with them in such a situation (especially where they're dead weight and need to be protected), but I guess technically monsters could've attacked them outside too, though the area in front of the door seemed pretty safe.