point taken.
Back on topic of OP: I like the time travel theory, if for no other reason than I like molly's character and would love the development it would take to get her from Molly to Mab.
Somehow I don't see it happening though.
Conversely, maybe harry is the Erlking (or thomas)? Same situation of problematic time travel, just sub in harry (or thomas since he's a hunter) for molly and erl for mab. Think about it, the erlking is such a bad mofo, but one of the aspects mentioned about him is that he's a PROTECTOR OF CHILDREN. Sound like anyone we know?