The realization hit Number One as soon as Luna spoke and the confirmation came right after when Nami responded in his mind, 'Baby~ I am in Luna's room getting fresh towels. I will be right back in the room so just wait for me. Luna is in the bathroom so don't go inside.'
Number One didn't hesitate to withdraw his hands but Luna suddenly pulled his arms back to inspect his hands and froze on the spot. He was already readying himself for an explosive reaction but she didn't do anything besides holding his wrists tightly.
"Did you mistake me for Nami?" Luna asked straightforwardly which caused Number One to sigh in relief. At least she learned how to be understanding and realized it was an honest slip-up.
"I really thought you were Nami and I tried to surprise her," Number One explained apologetically. "Hope you are not mad at me. It's hard to tell you apart when you are wearing towels on your body and head."