I think the scene with her and Goodwin was meant to show that she might have a personal grudge against the Losties. The same way Pritchet (?) did, only not as immediately violent. Of course, I'm beginning to think that the Others are just two steps ahead of the Losties, I think it's more like a hundred steps ahead. I also think that the Others turned the crash into an experiment. They kidnapped members of the tail section that they wanted to use as laboratory control subjects, and they are letting the beach Losties be the field study. Everything we've seen up to this episode has been the Others manipulating the Losties within the field experiment. It could be they are just waiting around for the women to get pregnant. And on that note.....what happened to Kate when she was on the Hydra station? Was she impregnated?