Even one would be impressive, but that isn't what earns Abigail the questioning, concerned look. He might not know anything about her manor, but he knows that it might be a liability. It connects her. Also, if she's dealing with them directly, it amplifies the potential threat. Derek wouldn't put it past some sly member of law enforcement to try and find out more about the mysterious benefactor, if one of her cards got into the wrong hands.

"You need to be careful with that," he says sharply, but the sentiment there is almost unthinking. Derek's will would have him slow to give a damn, but the reality has always held true: he is perilously quick to become invested, and right now Abigail is putting herself in danger.