Board Thread:Speculation House/@comment-14138255-20151129182644/@comment-24994749-20151129221144

@ Spiegelmeister

Not necessarily incest, but it's possible the Schnees practices marriage between first/second cousins or even still do it in order to maintain the "purity" of their bloodline.

Would certainly explain how they break the rule of unique semblances and also have a semblance with so many unrelated abilities.

It's also possible Weiss/Winter are expected to settle for an arranged marriage in accordance to maintain it that way.