Board Thread:Character Discussion/@comment-24386552-20140319162921/@comment-24386552-20140323165600

She has  to be her half-sister. Though she collected Regina's blood per flying monkey, I don't think she used it to open the blood lock. I think she is using the potion for something else. Also, she wouldn't have been able to escape in Storybrooke, when Emma and Regina had her cornered, if she wasn't in Regina's bloodline.