Alex reconsidered

Yknow, I wonder if Alex is a willing part of the Others after all, just playing a rogue Other to gain Lostie trust. What'd she accomplish last night? She let Jack out, but that led to Ben getting what he wanted - the operation. Ditto her rushing into the rock-breaking area - that motivated Kate to try to pressure Jack.
She did help Claire escape, but now I wonder if that wasn't what the Others wanted - they test Claire, they let her go, but this way they still have that fear thing going on by making Claire thinking she's escaping.