It's been a thousand years sister

The Mikaelsons had another sister called Danielle, Dani for short, and when Freya and Davina do a spell to see if she was still alive as Mikael said that she died but Mikael never said the truth about anything so they end up in Forks, Washington. The Cullens are gathering witnesses to prove that Nessie isn't an immortal child but then they find out that Bella isn't who they think.