If she had eyes, she'd roll them. "Not sorry, not that complicated, you know."

There's a mirror between them. Even without a sense of the future, she knows Ellie can't do anything if she freaks out. What's she going to do, reach through glass? (Drop her torch and light her side on fire. That seems most likely. And guessing feels not only lost and lonely but annoying.)

Ruth steps aside a little further, gesturing vaguely to the rest of the room. "Pardon, yes-- Be my guest."