I think Lucy was Eve. if the DNA theory is correct and Adam passed on his power to his children then Desmond is basically Adam. and Lucy would've been the same with Eve.
Then this just gave me another idea...what if Juno had Desmond kill Lucy just for the fact of stopping Desmond's bloodline from continuing? What if she was trying to end his bloodline, so she did that by killing the last living descendant of Eve, being Lucy? Does this mean TWCB are against the Assassin order?