Board Thread:Spoilers!/@comment-4877635-20140901190111/@comment-24674051-20141029144134

To answer Melissabeth's question straightforwardly, it is just a conjecture. We know that there is going to a middle sister of three that really loves her family, we accept that the Snow Queen and the Queen of Arendelle are sisters (at least for now, and I have yet to see anything that would contradict that assertion), and we know that the writers just love to have everyone related to someone. So it does not seem to be too much of a stretch to assume that the relationship the writers are going to use is Belle's Mom, Collette, as a 3rd sister for the Queens. Once we make that assumption, the fun begins (and I am just as guilty as the next when it comes to making assertions based on a flimsily supported hypothesis). That is the fun of the forum, to play "what if" games and speculate on which direction the writers are going.

And really, having the relationship through Belle does not mess up Henry's family tree as much as other relationships might. Belle herself is only related to Henry because she married Rumple. Now if we were to find out about some relationship of, say, Milah (heaven forbid I should even give the writers Ideas), that could add to the mess to the family tree.

And Hook's relationship to Henry could be really messed up as well, since some have considered Hook to be Neal's Step Dad, and possibly will become Neal's Son's Step Dad. But this is off topic.