Stefan and Damon in “Unfinished Business”

Stefan

So that went well.

Damon

Every other vampire turns it on, no problem. You kill. You feed. You do all the awful things that a vampire does. And then when you're done, you turn it back on. Why is she being so stubborn?

Stefan

Because she has nothing to come back to. Her home's gone. Her family's gone. She alienated her friends. She destroyed her relationships.

Damon

No. She wants to come back. Scaring the hell out of her should have worked. She's smart. She know we're not gonna hurt her.

Stefan

All right. So we get somebody else, somebody who would really hurt her.

Damon

Who? Katherine?

Stefan

Think about it. She's the reason Jeremy's dead, right? So if anybody's gonna provoke an emotion, it's her.

Damon

So we call her and then what? Beg her to help us out of the kindness of her own heart. You kidding me?

Stefan

Katherine was just abandoned by Elijah. She has nothing. She has no one. We invite her into our house to come torture Elena. There's no way she's gonna turn that down.