Kate knows there's someone there, she always knows what's in her environment, but she can't look away. For once on the island, she trusts that it's safe long enough to do what she needs to do. So she's surprised when it's Jim. Pissed, too, because he reminds her so much of Jimmy. I'm Jimmy, by the way. Hi Jimmy, I'm...? Who's about the only person besides Biggie and Will who's ever seen her cry.

She dashes at her face with her wrist, scrubbing at the telltale streaks and spits out, "No. I have to see what happens." And then a beat later, because he is who he is, she dredges up the attitude and the snark to say, "And did you seriously just call me Katie-bug?"