"You know how to tell us apart!" The impulsive, indignant response is out of her mouth before she can fully even process it, a knee-jerk reaction stemming from her private abhorrence of the fact that there was someone else on the face of the earth with her face. Katherine hated to be compared to or mistaken with Elena in any instance, especially with anything that had to do with Stefan. It was one of her few sore spots.

Setting her jaw stubbornly, Katherine stews in helpless rage, shoulders jumping up and down as she huffs out a frustrated breath. She knows Stefan is correct, but damn it, she doesn't like it at all. And this isn't something she can make go away, either, which only adds to her annoyance.

"Fine. You and Elena have fun with your little alien-induced reunion."