On Craphole Island, Sayid is washing himself at some makeshift basin that seems to have been set up as far away as possible from any of the Lostaways' camps for some reason. Ana-Lucia comes running up, and demands to know where Jack is. She's pretty pushy with the guy whose soul mate she Cheneyed not all that long ago. Sayid calmly asks her why she needs to know.
So now they're in the jungle, and Ana-Lucia points to a figure skulking through the brush. It is, of course, Rousseau. I mean, "the French woman." Sayid tells Ana-Lucia to go back, and not to tell anyone what she saw. Like anyone would even ask her about it anyway.
So Sayid stalks Rousseau the French Woman until he catches up with her and asks what she's doing there. "Looking for you," she says. Dun dun dun...? I guess.
Rousseau's stomping through the bushes, Sayid following her, and he's doing this weird thing that I'm not sure what it is...oh, he's asking her questions. Although she's not actually answering most of them. Basically, he's wondering why, if she was looking for him, she was skulking around the bushes. He finally just stops and says he won't go anywhere until she tells him what's going on. See, he hasn't forgotten that the last time she showed up, it was to tell them that the Others were coming, except she was lying and it was a diversion to try to snatch Aaron. I suppose it's possible Rousseau has forgotten all this and needs Sayid to recap it all. She makes a face like, "Oh, God, here we go with the bringing up of the baby-snatching." And the upshot is that he doesn't trust her. "This place that I'm taking you to, there's something that will help you. Something important," she says. Well, that clears everything up. And as for trust? She hands him her rifle, which he takes. "If I'm lying, it's yours to use," she says. He checks, rather awesomely, to see if it's even loaded. Satisfied, he asks how much farther they have to go. "Not far," she says.