Err...Yes I do?
The original fairytale does end with Snow White having the Queen dance to death at her wedding, by forcing her to wear shoes made of boiling iron.
And Fables-versions of the tales most of times are WAY darker than original fairytales are.
Adding to that, Snow owns the magic mirror Evil Queen had.spoilers
In the comics this is a prequel to, it is said Snow faked her death to escape the queen - yet afterward Snow has been shown to regain her kingdom...and spent few hundred years living in the open. Which would not be possible with Queen going after her.
After marrying Charming, Fables/TWAU-Snow did track down every single person to ever hurt her and made them die gruesome deaths. There's no reason to expect she somehow left Queen alive. Snow White is NOT the one for forgiveness.