One couldn't expect a shinobi to not be a sharp observer of body language, but having someone react contritely to someone else's discomfort was not. It could, of course, be an act. Then again this was all spontaneous, Fugaku's being here and the misstep had been entirely his fault, so it wasn't at all likely this was some ruse to get his guard down. Which is wasn't. It would have been easier to stick Fugaku with a poisoned needle. No one would take is amiss is an old man suddenly becoming disoriented or light-headed and needing assistance.

Thus, it was most likely safe to label this act one of kindness and not espionage. And he was supposed to not be so suspicious of foreigners, according to Mikoto. It was bad for trade relations. Being outwardly suspicious anyway.

"Don't apologize when someone thanks you."