Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-26464372-20150311155244

JayHart wrote: There's a possibility, yeah. She could be completely unrelated to Yang - hell, what if she was actually Blake's mother? XD Ok, maybe that's a bit of a stretch - you could be right, and there is no relation. But then that would suggest that Qrow and Raven were Summer's older (twin?) siblings, and Yang is the daughter of yet another different person. It could be an alternate universe version of Yang for all we know.

I know that sounds a bit silly, but that could be another possibility.