Twilight was written by Bella to look how she wanted to be seen, Jacob wasn't in love with her, when they were 13 and 14 Bella made one last trip to Forks and it lead to her being pregnant by Jacob She gives birth and leaves her daughter with Jacob and refuses to acknowledge her, Jake at 13 with his dad's help raises his daughter doing odd jobs for money to take care of her, when he learns about being a wolf he's hatred for the Cullens isn't jealousy about Bella it's for Sarah shifting at three years old