After seeing Littlefinger and Sansa kissing, the dependably crazy Lysa Arryn calls her niece to meet her by the Moon Door. Sansa should be feeling a little suspicious by this, but she obeys. Lysa then confronts her about the kiss, screaming and yelling about how she loves Petyr in a way Catelyn never did. She grabs Sansa by the hair and holds her over the Moon Door, threatening to throw her out. Littlefinger comes the rescue and persuades Lysa to calm down. He assures her that he only loves one woman...Catelyn. Immediately following this confession, he pushes her out the Moon Door. As if it wasn't obvious already, this scene really demonstrates how little Littlefinger cares about Lysa beyond her value as an asset, which has become obsolete after their marriage. Lysa was always a tool for Littlefinger's plot, and threatening the daughter of the woman he loves was the act that severed any usefulness she still had. Littlefinger is a true sociopath, which makes you wonder how much he really cares about Sansa or even Catelyn. He's given us good reason not to trust anything he says. Now with Lysa gone, someone will have to answer for her murder. Sansa was a witness, so will she side with Littlefinger as an accessory to murder? Littlefinger is already ill-liked among the lords of the Vale, so Lysa's death will only fuel their distrust in him. Whatever happens as a result, this was a great moment to end a great episode, if only to see the repulsively insane Lysa fly. Robin would probably laugh.
