Spoilers ahead from "Game of Thrones" Season 7, Episode 5, "Eastwatch."

It's a trap!

The Stark sibling reunions of "Game of Thrones" Season 7 have not been as warm and fuzzy as we would've liked, and Petyr "Littlefinger" Baelish seems to have picked up on that, too. Arya and Sansa Stark have always been very different, with their own rivalry, and things got tense in Episode 5, "Eastwatch." Arya gave Sansa a full read, accusing her of being disloyal to King Jon Snow in his absence.

So Littlefinger did what he does best -- he created chaos. (It's a ladder!)

He orchestrated a little scene, appearing to secure and hide a scroll that he "confirmed" was the only copy in Winterfell. He acted like he was doing it under orders from Sansa. Arya found the scroll and read it.

Out of context, it looked bad. It looked treasonous. But in context, it appeared to be the same letter Sansa wrote Robb back in Season 1, in an attempt to help their father. 'Memba that? She was basically forced to write the letter -- by Queen Cersei (and Varys, and Littlefinger himself) in a different orchestrated scene:Here's what the letter said (via Vanity Fair):

"Robb, I write to you with a heavy heart. Our good king Robert is dead, killed from wounds he took in a boar hunt. Father has been charged with treason. He conspired with Robert's brothers against my beloved Joffrey and tried to steal his throne. The Lannisters are treating me very well and provide me with every comfort. I beg you: come to King's Landing, swear fealty to King Joffrey and prevent any strife between the great houses of Lannister and Stark."

Arya was no longer in Cersei's custody at that point, so she has no context for the letter. At the time, Robb was confused, but their mother Catelyn Stark instantly realized the letter was written in Sansa's hand, but with Cersei's words. Littlefinger wanted Arya to find the letter to further the rift between the sisters. If he can get Arya out of the way, all the better for his plans.

The Episode 6 promo shows a tense meeting of Arya and Sansa, with Arya's voice saying,"You're scared, aren't you? What are you scared of?" Is she talking to Sansa or Littlefinger?

We'll find out this Sunday, Aug. 20 at 9 p.m. on HBO, in what's already the penultimate episode of the season.

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