Board Thread:Spoilers!/@comment-4877635-20150304180627/@comment-24674051-20150424175255

Oh, didn't you know... Maleficent is Cora's aunt on her mother's side. Xp We all know how they like to have everybody related, and they really have not done that yet this year. (totally sarcastic, btw)

On a more serious note, seeing how Cora came by Mal's spell book is probably not germane to the overall plot. It may or may not come into play in the future, but I would anticipate that this will be unexplained for now. (which is OK. They don't have to explain every little detail, as long as the detail makes reasonable sense, which Cora having Maleficent's spell book does sorta fall under.)