You are from the Weasley family, Molly Weasley and Arthur Weasley You are the same age as Ron. Because you were sorted into Slytherin, you are seen as bad in the family, so you are discriminated against. This is your 2nd year in Hogwarts. Fred, George and Ron brought Harry home last night and breakfast is being prepared

Harry: "I don't know how you keep up with all your kids."

Molly:"Yes me sons and daughter."

Harry: "I didn't know you had two daughters?"

Molly: "I don't want to hear about her"