Hotch had lost his temper. It had even scared you, his partner on the case.

It all started when the criminal started flirting with you and making all sorts of inappropriate comments that obviously made you uncomfortable.

When Aaron had had enough, he slammed his fists on the table, scaring both you and the criminal.

Then, he'd excused himself. When you found him again, he was tense. "I'm sorry." It had triggered his possessiveness over you.