This Is Exactly Why Sansa Makes Her Final Decision About Littlefinger

Littlefinger spends a good portion of seasons six and seven undermining Sansa's family members to her once she returns to Winterfell — first Jon Snow and then Arya. His goal is to turn them against one another and help Sansa emerge victorious, with Littlefinger at her side.

Luckily Sansa and Arya see through it, though we would not have minded if the show had been able to spend a little more time fleshing out this storyline, maybe with a few hints here and there that Arya and Sansa were at least somewhat suspicious of Littlefinger.

But let's ignore the fact that they're coming a little late to the party and embrace the fact that they showed up at all — hooray, hooray, Littlefinger is dead.