[He grasps her hand with a soft touch and follows her movements, grasping on as she speaks. Her words do fill him with visible concern and worry.]

O-over a year? What? But... [Sokka had already explained to him how different times worked- and he had been stuck here for a half a year. But Katara being gone for over a year and in some other place, it was a whole new level of unsettling.

After he leaves that hanging for a moment, he shakes his head in resignation.]

I'm sorry, Katara. I had no idea... [He gives her hand a squeeze.] I- I can tell you. But I don't wanna tell you how to act. I just wanna... help.