User blog comment:Jasca Ducato/*Spoilers* Juno, Eagle Vision and all that. *Spoilers*/@comment-1872981-20101124154528/@comment-6517-20101125113237

Personally, I don't buy the traitor theory, although she did disappear for a time after Sequence 5 upto Sequence 8*hellip; The way I see it is this: Desmond is a direct descendant of Adam, this we know. So it'll probably turn out that Lucy is ad direct descendant of Eve. Probably end up being something like, she needed a near-death experience to prepare her for what is to come.

Subject 16 says " Find Eve. The Key. Her DNA." Assuming Lucy is a descendant of Eve, one reason Desmond was forced to stab Lucy might simply be, to get her blood and remove her as an unknown variable as I've already mentioned.