Haibara knows him too well for that. Nanami means to get more comfortable with some things because Yu sincerely wants them. It's simply hard after all this time. Though Haibara has his ways of getting what he wants. He inhales when Yu goes to his knees.

"Yes," Nanami admits with a moan. "This and doing the same to you." Because he enjoys making Haibara squirm too. Though at the moment, he's mostly focused on the way Haibara's mouth feels around him. One hand presses against the side of the shower.