Board Thread:Speculation House/@comment-176.252.33.135-20130907230611/@comment-17732608-20130908065909

...Except there's no real overt or obvious indication that the assumption is true.

On the other hand, we HAVE seen Weiss constantly shocked or surprised by Ruby's antics/abilities.

Occam's Razor; The most likely guess tends to be the correct one. (HORRIBLY pared down, but close enough.)