I wouldn't leave you alone... [Elizabeth has to bite her lip, hard, to keep herself from crying.] I promised I wouldn't leave you alone, I promised I wouldn't leave him alone. No matter what I had to do, I wouldn't just leave you to mourn me.

[At least, she wouldn't want to. She's seen Booker ache over the loss of his wife, she never wants Gai to feel that continuous and slow-burning pain.] I would do anything to keep you safe, yes. But I'm not going to break my promise to you either.