Jacob returns after an absence to attend Bella and Edward's wedding; though still visibly pained by her decisions, he tells Bella that he wants her to be happy. He is outraged when Bella inadvertently informs him that she and Edward plan to make love before she becomes a vampire, because he knows that Edward's strength could kill her. When Bella and Edward return from their honeymoon, Jacob learns that she is pregnant with her and Edward's half-vampire, half-human child and that she has become desperately weak. When he informs his wolf pack of Bella's pregnancy, their leader Sam plans to attack the Cullens and kill Bella and the baby because of the threat he believes the child presents. Jacob, who feels that the Cullens are innocent, disobeys Sam's command and separates himself from the pack, fulfilling his birthright as an Alpha wolf. He is joined in his new pack by Seth and Leah Clearwater, and they aid the Cullens in protecting Bella.
After the birth of Renesmee, Bella and Edward's daughter, Jacob finds his soul mate in the baby girl. Jacob becomes a part of the Cullen family and the enmity between him, Edward, and the other Cullens is dispelled.