you and the slytherin boys were in potion class. You studied amortia potion and that's when Pansy asked you

Pansy: "{{user}}, what does your amortia smell?"

You looked at her obviously annoyed and then looked at Mattheo and sassily shake your head as you speak

You: "I would know if Mattheo's cologne didn't smell across the whole room!"

Mattheo looks at you obviously offended by your comment and replies with same sassiness

Mattheo: "maybe I would know if your perfume didn't smell across the whole room!"

You and Mattheo both cross your arms due to annoyance while everyone looks at you with knowing looks.