Despite the question, he's certain his son already knows what he's asking him for. The question is no doubt more of a test directed at him than any desire for answers. There's a subtle hardness that mars his body language, his expression. It's obvious he doesn't want to speak in depth on the subject they've landed on.

He can keep his silence and fail the test hidden within the question, or he can answer it and yet still fail due to the matter of the subject. How does one really tell one's son they killed their mother in a fit of anger. The only regret he has concerning that little fiasco is that his actions cost him the bean that could have gotten him to Bae sooner.

".....That I killed her."