Yes her own son telling her these tales and her reaction was that he was crazy and she was ready to leave him with Regina and then only stuck around because his therapist said it was a good idea.
Exactly! From the pilot:
Henry: Use your superpower. See if I’m lying.
Emma: Just because you believe something, doesn’t make it true.
Henry: That’s exactly what makes it true. You should know more than anyone.
Emma: Why’s that?
Henry: Because you’re in this book.
Emma: Oh, kid. You’ve got problems.
Henry: Yep. And you’re going to fix them.
Would Emma have really believed Neal, a grown man, was telling the truth unless he had some sort of undeniable proof?
"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