Jack has needed a few minutes to recover, to let his Custom Job do its work and heal up the damage that the Curse had left on him. He hadn't been intending to get involved, trusting the Heroes to make a decision they could all live with. But when Lust looks at him like that. He knows the desperation that can come when something that you want this badly about to slip through your fingers.

But all she wants is to be human. Who is Jack to deny her that?

"The right thing to do really is to save her life, to give her back the choice as to what to do with her life."

But then Jack looks squarely back at Lust. "If she even has the knowledge that you're seeking, is getting it from her worth risking more lives? If we bring her back and we can't control her, she might make the choice to kill again. She's going to keep taking up our time, to keep pushing us further until we do what she wants."

"So I need to know: is it worth it? Is humanity worth that?"

There is a trick and a trap in that question. Jack wants to know if Lust even understands this thing that she's searching for.