Board Thread:Spoilers!/@comment-4877635-20140901190111/@comment-25562474-20141029135855

Maybe I missed something, but when did they say Elsa/Anna mom and Snow queen had another sister? Is this just a theory because a blonde woman was cast to play a middle sister that loves her family? Elsa said her mother never mentioned a sister, let alone two. If we are to believe Auntie Vanilla that Elsa's mother never mentioned her because of troubled past (or conflict, can't remember the wording) then why wouldn't the other sister have been mentioned?