[He focuses on her as long as he can manage, but by the end of it, his gaze shifts away.]

It was never about me not trusting you, Pyra. If I thought I couldn't trust you, I wouldn't have told you anything. I would've just left the house and come back when it was done, and that didn't feel right to me. Why is "I'll tell you later" not okay?

[This feels an awful lot like a "no secrets" rule that he didn't know existed before now, and he's sure that isn't exactly what she means, but the implication that he didn't trust her when he was trying to without breaking his word also hurts.]