I think the “game-changer” for Baelfire and Rumple is going to be prompted by Henry, not Milha. Adam and Eddy have emphasized that prophesy about Henry being Rumple’s undoing for a pretty big reason, which is going to be revealed over the last two episodes.
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"That’s how you know you’ve really got a home. When you leave it, there’s this feeling that you can’t shake. You just miss it." Neal Cassidy