It is— [ "My duty"? That didn't sound quite right. Old habits did die hard, and this is one he has been all too used to. While serving the royal family did not have the same meaning it once had, that changed little on his outlook.
Now he did so not out of obligation, but of a desire of his own. His own independent will. It was truly a strange sensation.
He bows his head again, though his muted smile is gentler. ] Think nothing of it, Princess.