My Mate Is my Possessive and jealous Brother

This story is about two sibling that are siblings by blood are mates but one of them already has marked someone else and his sister can't bear the pain so she escapes to another pack were she falls in love or so she said to herself.she liked him but she didn't love him.Her brother goes through hell when she's gone and swear to God that when he finds her he's not gonna let her go.

Well guys this is getting hot so call the fireman:p