in which someone learns that ya don't say 'don't look' if you don't want someone to look

The two youngest were playing in the sprinkler a little while today.  No 4 ran upstairs and was already changing by the time No 5 headed upstairs.

"Don't look in my room, I'm naked!" he warned as she was nearly at the top of the stairs.

"Yep," I heard her say as she passed by his room.