Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-96.238.1.154-20130804085459/@comment-4295751-20150118131615

Actually it was - never shown but - implied that Cora is an alpha now, because the only way for Derek to cure Cora was to give her the alpha spark. That spark so strong that only that could heal her. From what I've seen I interpret that Cora is now an alpha.