We all know the story of the Katherine Pierce, or Katerina Petrova, but did you know she was in love? Before she found out about the supernatural she fell in love with Niklaus Mikaelson, and they had a child. The baby was conceived because. Niklaus was part werewolf, and Katherine was still a human. When the baby was born, Katherine thought she died at birth, same with Klaus, but he baby girl survived, only to be brought up in a world of supernatural beings and never knowing her parents. All rights go to the CW and creators of The Vampire Diaries