Edward prepares to bring Bella home where it's presumed that Carlisle will "take care of it. Bella jumps out of the window, kicks off her shoes and goes barefoot. During the month of preparation for the Volturi, several of the vampires with quantifiable supernatural talents teach Bella how to expand the barrier.
Esme had designed it and renovated it.
It was twisted and disturbing. Seth steps in, and Bella accidentally breaks his collarbone and shoulder before managing to calm down. Her body continues to reject human food, and Jacob sarcastically thinks about the "creature" craving for blood. Then she decided not to play by these rules.
He asks her if she would try again. They are conflicted about who they are.
Renesmee matures quickly and soon is able to speak, walk and hunt. The world shimmers.