The part Emma does not know is Milah’s connection to Neal and to Henry.
Actually, I have to disagree. I think Emma already has an idea who Milah is from Tallahassee. Hook never specifically said Milah was Rumple’s wife but I think Emma knows, Rumpelstiltskin wouldn’t have gone after him if Milah wasn’t already involved with Rumple. Emma’s smart.
but it would be nice for Hook to sit down with Emma and tell her everything.