User blog comment:Zathronas/Analysis by an author: Volume 2 episode 6: Burning the Candle/@comment-25091485-20140905022200/@comment-25091485-20140905032834

My bad, missed out the part about after Summer died, only then did Yang realise her biological mother was not Summer.

Anyone curious why a clue to Yang's Mother's whereabouts would lead to a deserted house full of Grimm on Patch (Island they grew up on), only for Qrow to show up and save them.