[Rogue's eyebrows rose again, and her attention was somewhat split. There was a vampire slayer inside her, you see, or at least the psychic remnant of one Melaka Fray, and she very much wanted to come to the forefront of Rogue's brain right now. There was only one good kind of lurk, and the talking kind wasn't--]

I reckon that depends on just how long you figure you'll be able to stay 'clean.' [It was an effort to speak past the voices in her mind.] I'd wake up feelin' pretty bad about myself if I walked away an' found out somethin' had happened because of it.

[The problem was, really, that she had no way of knowing if he was telling the truth, no way of knowing if he was even telling the truth about being a vampire, let alone how long he'd been 'clean.' But why would he bother to tell her at all if it wasn't true?]