Daniel Cooper's expression subtly changed, "She and Zachary Shane were just university classmates with nothing ambiguous between them."
Furthermore, if it weren't for the Old Man at home constantly interfering, they probably would have had who knows how many children by now, but these were things he would not discuss with irrelevant people.
He was indeed unhesitating in his protection of that woman, to the point where it had almost become a conditioned reflex.