y/n and harry are arguing

Y/n:ur such a goody goody.

Harry:I'd rather be a goody goody then a bad person.

Y/n:you sound like ur mom.

Harry:thank you.

Y/n:and how'd that work out for her.

after y/n said that all the slytherin boys were in shock whilst tom riddle was trying his best not to break put into laughter.