There, that, that finally strikes Billie as out of the ordinary. As far as she's been guessing thus far, they've maintained some kind of unsaid truce on what happened in the past. He doesn't bring it up, she doesn't try to stab him again, it all works out for the best (physically, if far from emotionally).

She's left speechless for a moment. Just a moment. Then anger flashes across her face. Briefly, but it's there before settling into wary neutrality, her fingers curling into fists on top of the table where she'd been resting them.

"That was different and you know it."