[Oh right, it's a dream! Her face lights up with sudden understanding as he explains, after it already lit up a little with a tiny smile at the compliment on her observational skills.]

So that's it. I wonder why they chase each other? Are they enemies, or is it some kind of game?

[If he's going to personify the moons, she's going to take it and run with it. It's a dream, after all. (Yes, she did hear him call them sisters when she asked first if they were enemies. Her family life is complicated.)

Hang on, though. If he knows all this....]

Are you from my dream?