He's about to open himself up for the criticism he knows he's due; when she berates him for what he's done and throws back in his face how she was right.

After the way he yelled at her and argued for his decisions, she deserves to say 'I told you so'.

He glances at Doc, but keeps his eyes away from Kate, turning his gaze back to his hands.

"After everything that's happened, an' the way things are I'd -- I'd like t'know what you're gonna do."