In regards to the battle of the bastards, can someone explain to me why people think that Littlefinger and the knights of the vail would fight alongside the Starks?? Littlefinger knows that Sansa is a traitor to the crown, while the Boltons have an alliance with the crown (Lannisters). I know he is all about masking his true intentions but if you think about it logically then wouldn't it be in his best interest to let the Boltons crush Jon/Sansa and then take down Ramsay?