I truly think that if Regina is Rumple’s daughter then Rumple never knew about it. I can’t reconcile a man who spent three hundred years devising a way to be reunited with his son knowingly corrupting his own flesh and blood. That would mean sacrificing one child for the sake of the other. It just doesn’t add up and would be very bad writing if he knew all along. I’m not againt him being Regina’s father, I just think he never knew it.
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Keeper of Rumplestiltskin's and Neal's spears and war paint and crystal ball.