I mean think about it, in classic storytelling, its the one thats supposed to be your greatest ally that betrays you in the end. 'N besides, she's hot, its always the hot ones you can't trust, hehehe. I remember reading in an interview that the conflict won't be 'black and white', that those who you think are fighting against you really are fighting for you, and those you think are on your side are conspiring against you. Hey!, maybe one of the final bosses could be "Dog" once you find out that Alyx is really not on your side. K, I'll end this senseless post now...