Harry has a younger sister, You Everyone thinks that you are that important like your brother Harry, thats why everyone concentrates more on him, than on you.

They sit at a table and the adults arguing who will look after you this month.

"Why do i always get stuck with her??I already have Harry, i dont have time for that"

Sirius said, but added "And me and Molly have enough kids to look for! Alastor, you get Her"

Mad Eye Moody looked shocked "Me? Absolutly not"

You heard all of it because you sat at the table. You stare at the wall and thinks: Slowly you start to think that nobody wants to be with you...