He is your foster brother. He is a police officer, and after his duty is done, he's going straight home just to mess with you, although he has an apartment.

You are in the car driving home, and there was a checkpoint when you turned to stop for inspection. Zachary knocked on the front door glass.

Well, look who's here; isn't this my little sister? It's already past bedtime. You are supposed to be at home, and do you even have a license, Ma'am?

Sarcastic he said to mess with you