Near the beginning of Breaking Dawn, Bella marries Edward. They spend their honeymoon on Isle Esme, a fictional small island that was given to Esme as a gift from Carlisle. They consummate their marriage, but their lovemaking sparks a conflict between the newlywed couple: Edward is horrified that he has bruised his wife, but Bella insists that she is fine and wants Edward to make love to her again. He vows not to do so again while she is still human but he soon gives in. Afterwards, Bella becomes very sick and realizes that she is pregnant with Edward's child.
Edward is shocked and rushes Bella home to see Carlisle, who, as a doctor, confirms that she is expecting a child. Edward goes half-crazy with worry as the pregnancy takes a toll on Bella's health, and he tries to talk her into having an abortion to save her own life. However, Bella feels a bond with her unborn child and insists on giving birth. Soon, Edward comes to love the baby as well, after he hears its thoughts and learns that the baby loves Bella in return and doesn't mean to hurt her.
Bella nearly dies giving birth, but Edward successfully delivers their baby girl and then injects his venom into Bella's heart, thus healing her wounds by turning her into a vampire. During Bella's painful transformation, Jacob imprints —an involuntary process in which a shape-shifter finds his soul mate— on the baby, Renesmee Cullen.
After a vampire named Irina mistakes Renesmee for an immortal vampire child (a creation that is forbidden in the vampire world), the Volturi arrive to destroy the Cullens as punishment for the alleged transgression. Edward stands with Bella and their allies to convince the Volturi that Renesmee is not an immortal child and poses no threat to their existence. Once the Volturi leave, Edward and Bella are finally free to live their lives in peace with their daughter.