Katherine Pierce - Know Thy Enemy

ISOBEL: The Isobel they knew was dead. So maybe there’s a part of me that’s buried here, the human part… The part that I abandoned when I chose to become a vampire. The part that used to dream about the day that she’d know her daughter.
ELENA: What?
ISOBEL: And instead you got to meet the other part. The part that would betray her own flesh and blood.
ISOBEL: I’m so sorry, Elena. I’m such a disappointment to you.