Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-24068166-20140725173420

I may be beating a dead horse, as I did not bother to read the previous entires before posting this. This is just an answer to the topic question.

Ruby and Yang are half-sister, seemingly related on the father's side

Summer is Ruby's mother (not Yang's it seems)

Qrow is Ruby's Unlce (unconfirmed if this is blood relation or not, and if he's Yang's uncle as well)