Board Thread:Speculation House/@comment-3257939-20131111020445

So what's the deal with Ruby and Yang?

I read somewhere that back in June, RWBY's Crew said that they are not blood-related and now Monty tell us via Twitter that neither of them is adopted

My best guess is that their Dad married twice, and why dad? Because Summer Rose may be Ruby's mother while Yang has a different mother, maybe that's the woman in the photo who went missing and now she is looking for her.

Whoever they are, I can't think of another reason that explains why Ruby and Yang are not blood related, have different surnames and yet, neither of them is adopted and their relationship clearly tell us that they have been together since birth. 