Supernatural Twilight

Isabella Swan isn't a normal girl. Her real name isn't even Isabella Swan. She wasn't some weak, human girl, who fell in love with a vampire. No, she was just tracking, spying... learning. Isabella Swan is really Rosemarie Winchester. Twin sister to Sam Winchester, she looked exactly like her mother. She had blonde hair, blue-green eyes. She like her brother has demon blood in her, which is why Edward can't read her thoughts. She grew up, with her brothers, and father, learning how to hunt, though she didn't find any joy in hunting, she didn't question things. On hers and Sams 17th birthday, a family friend who was also a hunter needed help with a case, vampire case to which John agreed to help. Her and Sam were sent to Forks, Washington to help out, as Dean (though urelunctaly) allowed this, he and John stayed near the Washington area in case they needed any help. This will not be a Bella/Edward story, this is a crossover between Supernatural/Twilight.