Mary Margaret/Snow White and the ring?

In fairytale world when his Mother gives him the rings she says it will help him find true love, which it did with Snow White. Since Snow White is Mary Margaret in Storybrooke I think the ring stayed with her there because she's still his true love.

also in " Snow Falls"....*SPOILER* she was the hooded figure in the arbre that jumped in front of Charming's carriage with that stupid-prissy Princess, from there they set off on a venture together and Snow grabbed his pouch, and took the green ring and put it on.

Last night we found out- he didnt object because he must have been falling for her, and his mother a dit give this to your true love- and I will always be with you- ou something