Board Thread:General Discussion/@comment-24834324-20140430224715/@comment-24386552-20140913233426

He was so blinded by his guilt, he didn't pick up on Ariel's quickness to changing subjects and once she got Hook to say he would do anything to make things right, she tricks him into swearing on Emma's name. Allowing her to cast her hex and revealing herself to be Zelena in disguise.