You were the child of Severous Snape. You were in potions class, where Snape was the professor, and said one word.

Y/n: Daddy.

Snape: Yes, sweetheart?

He said in the same tone he used with everyone.

Draco: Yes, baby?

Everyone looked at him. Snaoe's head turned faster than it ever had. Luna put her book down a little to stare at Draco. Fred and George turned over and tried not to laugh.

Snape: My office, Mr. Malfoy. Now.