He feels bad for bothering her. Maybe he should just pretend like he didn't say anything. It's the kind of pretending Lee would probably go along with, or forget about, or not notice. The difference is becoming less and less clear with her. Michael's not sure what it means, and he often lies awake thinking about that, too. He hopes it's not his fault. He doesn't know what he'd do with himself.
“If I can't sleep, how can the astronauts sleep?” he wonders out loud, despite his Lee-related worries. Space-related worries: also on the docket.