Regina has the same bit of magic that Emma has. The magic that a mother has on her son. I think the reason why no one returned back to fairytale land was Regina gave up Henry.
In Apple Red as Blood, Mr. Gold said. “The curse meant to take away Snow White and Prince Charming’s happiness, perhaps you giving up Henry is just the price to keep the curse unbroken.”
Although, Emma gave her true love kiss to Henry, Regina did give up her love for Henry in return. Keeping the curse alive.
So, ya, Regina does have a maternal love for Henry, which was enough to keep everyone in Storybrooke.
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