Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-11188061-20140804015447

So, from what I deduce from all your inputs, the most logical answer is:

1) Yang Father and Yang Mother first get together.

2) Yang's Mother died.

3) Summer Rose (Ruby's Mother) and Yang's Father met.

4) Summer Rose and Yang's Father gave birth to Ruby Rose.

5) Summer Rose dies.

It can be a divorce, but then Ruby and Yang gelling with each other so well doesn't seem too... realistic. I know realism is pretty bullshit in this show (it goes unexpectedly anime with Jaune's arc (heh) for example), but really, it's rare to see the daughters of the er, conflicting mothers to have such close relationship with each other.