Damon: Am I the only one who has the ability to put two and two together? Isobel…hello? She dated John when she was fifteen. She gets pregnant and ends up at the doctor’s office of John’s brother. Now what do you think John’s role is in all of this? Hmn? … Go ahead think about it, I’ll wait. Did you get it? You there yet? Hmn?
Stefan: So you think that John is … Elena’s father?
Damon: Ding ding ding ding!
Stefan: What proof do you have?
Damon: I don’t need proof. That’s a DNA test for John and Elena and Maury Provicl to deal with. But I know how well you deal with these big bombshells so … Sleep tight.