Those store decorations don’t scream wedding, though. They sorta read more “baby shower”
I had that thought, too, but then the colors, pink and white, don’t seem to match the gender of Snow’s baby. Based on the official photos for 3×20, it appears that Snow and David’s second child is a boy. That is why I think the colors, pink and white, could be for a bridal shower or an actual wedding for Belle, since no one else in town would have a wedding event in Mr. Gold’s pawn shop.
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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