The tree house isn't particularly large, which inevitably leads to a certain nearness when two adults sit next to each other against the wall opposite the door. (Which is indeed the safest place to sit in case you're afraid someone might break into the little shack you're hiding in.) However, Granger surely had no intention of dozing off. But that's obviously what happened, because her muscles are perceptibly relaxed and she's breathing slowly and evenly. Maybe she was too exhausted after all? And my chest was just there?