Interesting twist but it seems unlikely to me that they would make Rumpel Eric too. Would feel redundant to layer another love story, plus it cannot have been a time in her past (she seemed like she had never explored much), so would be in her present. Plus the certain mermaid line was said when Regina had captured Belle.
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“If I had a world of my own, everything would be nonsense. Nothing would be what it is, because everything would be what it isn't. And contrary wise, what is, it wouldn't be. And what it wouldn't be, it would. You see?” -- Lewis Carroll, Alice's Adventures in Wonderland & Through the Looking-Glass