"The mother... looks exactly like when Moka is sealed..." ... c'mon this has to mean something if even Tsukune and Mizore comment on it right? The actual surprise here is that she doesn't look inner Moka, the original Moka.
With this broad hint you'd have to be blind not to see there's a part of the mother in the rosario that to some point also manifests in outer Moka's appearance.
...but I'm sure people who wouldn't like this development, for whatever reason, will argue this in full denial mode as well
I don't see this as mere speculation anymore with #29 translation, nail me down on this one ... and when time comes throw this post into my face if by chance I'm wrong after all