Ok so she had caught that, but Hendrik wasn't going to worry her. He'd just have to be more careful. "No, there is nothing wrong." And since the two of them were in one piece and no one was attacking them, there was nothing wrong, except that he was determined.

The knight would be faithful to his words, to protect Yotsuyu and to keep her safe no matter what the personal cost to himself, it was just that simple.