If the heart is Katherine’s, which is is neck and neck in my mind with it being David’s heart, then how do we account for David’s strange behavior. We know that people without their hearts can still be walking around SB, Graham is an excellent example. However, David’s mood does fluctuate back to “normal” after the episode in the woods with MM. What happens when he goes into these coma like trances?? Is it possible that his mind reverts to be Charming/James? The question then is also how did MM’s fingerprints get on the box. Which is why I think Regina had to somehow magically manipulate MM in SB to holding the box, and probably burying it.
"He was a lot of things to me" "The only conclusion was love"