He's pretty sure that she should be feeling more than that with how much blood she's lost, so it's a strange reaction. Did she have some kind of power that affected this? Regeneration would make sense, considering his own worked similarly(although not quite, considering he hasn't much use for his own blood these days) but that wasn't worth thinking about right now. Definitely something to figure out in the future though.

"I was...feeding." As if to demonstrate this, he lifts the hand he'd used, revealing the fingers to be bloodied. "In other to survive I'm in need of blood as sustenance."