Board Thread:Speculation House/@comment-14138255-20141031002615/@comment-10390252-20141208140125

Zolnir wrote: Cinder knows her as a particularly active (and lucky) Huntress who may play a factor in her plans. But I doubt she knows that Ruby is the daughter of Summer Rose... Or she knows full well but it is not yet the right time in her plan to mention it or even openly acknowledge it in a way that might make her minions suspect that the little girl has a significance all of her own. Either option (and others) would fit the on-screen evidence to date.

It's one of those matters where so little has so far been said or shown on-screen that we're all guessing.