Oh God, he wouldn't know how to react to Nami if he found out! Because she's totally a pirate and that means that he considers it his duty to arrest her, but at the same time she'd remind him of Bellemere so damn much. And he'd totally slip up and maybe pat her awkwardly on the shoulder or try to give her fatherly advice or something, and Nami might not know why he's being so weird around her but she'd totally figure out how to use it to her advantage! XD