Quite a lot happened on last night's episode of Game of Thrones, but one development in particular seems to have caused a bit of confusion. Towards the end of the ep, we see Arya spy on Littlefinger as he hides a mysterious scroll in his chambers. A spot of expert lock-picking later and the youngest Stark girl has read the contents - although we only get a brief glimpse of it.
Even still, it was enough to discern that the scroll was written by Sansa, and what it says may well drive a wedge between the two sisters.
Although this hasn't been 100% confirmed, the prevailing theory is that the scroll is the one Sansa wrote to Robb, pleading with him - under duress - to surrender to The Lannisters and bend the knee. Though Sansa was basically forced to write the note, it may still serve to set Arya against her older sis - something Littlefinger is only too aware of.
Will the Stark girls find out that they've been manipulated before too much damage is done? Be sure to share your theories in the usual place.