User blog comment:Kajune/Lucifer, first son?/@comment-3068419-20160413231453/@comment-34326521-20160414115736

You're right, the writers can't make a mistake like that. Everyone knows the parallels between Michael and Lucifer and Sam and Dean were intentional. There's no way it could be a continuity error. That leaves two possibilities: Amara used figurative language for the first time in her life despite saying the same thing literally in the same sentence, or it's a retcon. I say it's a retcon, because the alternative makes no sense.