My biological parents want the misfit I am back... And i want to be back?

A girl has lived all her life with her family. She has the normal teenaga drama, she doesn' get along with her older brother, and her mother is... A mother. And then she finds out she was adopted. And her real parents want her back. And she has ANOTHER brother. Oh, on top of that? Nobody wants to tell her WHY she was givien up at birth. Yup. Just another normal teenage life.