User blog comment:Alexa dreamer20/Would Bree Tanner belong in the Cullen family?/@comment-66.139.154.211-20141119034142/@comment-7600752-20141122022953

They couldn't adopt Bree - the Volturi demanded Bree's death and the Cullen's had no choice but to accept this fact. The Cullen's DID ask a couple of times if Bree could stay with them. However, the Volturi refused. With Jane's pain power, there was nothing the Cullen's could do to save Jane. The Cullen's knew this... they did everything that they could do to save Bree. But the Volturi chose to kill her. Plus, the Volturi does NOT want the Cullen Coven to grow any larger - they're already the 2nd largest coven next to the Volturi Coven. Bree could have also potentially have had a power that hadn't yet manifested itself. The Volturi didn't want this either.