Aaron was the mother of the group. Defiantly. You had gotten hurt on a case and after giving you a full lecture and bandaging your arm.

You had said; "Thanks mom" as a joke.

Hotch was just about to walk away and turned around to stare at you and put his hands on his hips, the mother pose. "Don't call me that." He said sternly. But it amused him to say the least.