Kate moves from "conflicted" to "troubled." It's subtle, I know. Then she goes after Mercutio, who's striding purposefully up the beach. She quizzes him on whether he believes Art, and Mercutio isn't sure, but figures they shouldn't take the chance and is going to get loaded up ASAP. She asks him if he's got enough supplies, and he interrupts her blatant ingratiation to ask why the sudden interest in the raft. "Because I'm coming with you," she says. Mercutio has this look on his face like it never until now occurred to him that more people might want to hitch a ride than he's actually got room for. Commercials.
You know, just the other day I was chewing some gum and thinking that the one thing it needed was more "xylotol," so thank God for Trident.
Mercutio's telling Kate tough luck, since there's four of them on the raft, and that's it. Kate's all incredulous, including Sawyer? Mercutio says that Sawyer had stuff they needed, so he bought his way onto the raft. Kate says that Sawyer doesn't know anything about boats, unlike her, who spent two summers crewing J-boats. She even tries pointing out that the deal Mercutio made was for the first raft, which burned, but Mercutio doesn't want to argue semantics. Tough noogies, Kate. And then she tries acting all surprised that Mercutio's taking his son, what with how dangerous it is. As opposed to, I suppose, leaving him without his father on the worry-free island. Anyway, it's the wrong tack to take with Mercutio, who snaps that he'll decide what's best for his boy. In this case, that means getting off the island.