Board Thread:Speculation House/@comment-17765263-20130909232212/@comment-24218038-20131130164820

That theory could work. But Ruby and Yang get along too well for sisters who were raised by different parents. Afterall, Yang used to read bed time stories for Ruby.

That depends it might have happened several years ago. The only thing that seem to debunk that theory is when Ruby explains to Blake that Yang used to read to her when she was little as in before she could read.