Oh my …. ! What if that comment from 1×18 “it’s my life”-“You silly girl, it’s mine” Really DOES mean that literally it is Coras ‘life’- Meaning Coras heart is in Regina. Regina don’t necessarily have to have two hearts, what if that deal she mate with Rumple somehow involved her putting her own heart in baby Regina. That would also explain why she has this twisted kind of love for her, because her heart is in her, literally..