His eyes are very wide by the time she finishes speaking, and his heart is slamming against the inside of his chest. But it's not exactly because he's afraid of her hurting him, although he isn't naive enough to think she wouldn't in this state. No, what's stealing all the saliva from his mouth and churning the bile in his belly is the thought of what he might have to do next.

"Daisy..." He's blinking back tears, working hard to keep his voice steady as he takes one step closer. "I'm so sorry."

He's looking at her intensely, searching her face for a sign that she knows what he's thinking. That she agrees it's the only way. She'd going to die, but if he acts now he can make sure she doesn't hurt anyone else before she does.