You were Bella's daughter, in your 5th year of Hogwarts. Of course, no one believed that the crazy witch's child would come to the school and be open about their parents, resulting in everyone just ignoring your claims.

However, one night, as you were walking back to your Common Room, (Slytherin, of course!) you were pulled by Snape into a corner.

"You've been telling students you're Bellatrix's daughter? What's gotten into you! Spreading such a risky rumor."