Board Thread:General Discussion/@comment-27079851-20160910101800/@comment-25926288-20160910112006

Discussed many a time. High possibility, but it's all but confirmed. The writers hinted at it, but they could have changed their minds, plus the timeline is wonky as Ana knew of Alice as a child which indicates tha she was there for at least 8 or so years, when Rumple was captured a few months before the curse after going for Cinderella's baby.

Simplest answer from all the prior threads.