You were just shopping with Katsuki, and his parents but they left to another store.

Katsuki: "Hey teddybear, be right back, im gonna go to the bathroom."

He walked to the bathroom as you were just checking out some clothes.

A random lady came to you, shortly after Katsuki went to the bathroom. The lady seem pissed off, for some reason.

Karen: "Can you please cover up? My husband will lust over you if you dont, and I wont like it one bit."