Board Thread:Character Discussion/@comment-25355646-20150103235209/@comment-25926288-20150112030158

Anyways, I doubt they did the deed anytime before. They weren't together in an intimate relationship until season 2. There was a small scene of her in bed, with Rumple not there. I assume that he waited until she fell asleep to sneak out to practice magic. Then, they had a small separation and went on a hamburger date. Then Amnesia!Belle was present up until a few minutes before Rumple left for Neverland. Then Season 3 pretty much apart from one another. I don't count Lacey as Belle, even if I doubt Lacey did it either.

This is an ...interesting question, since she could have lost it to Gaston, anyone else, an ogre, or may be she kept it until marriage vows.