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  ===''A Storm of Swords''===
  Baelish is given charge to marry Lysa Arryn and bring the Vale under the control of the Lannisters; before departing he reveals Olenna Tyrell's plan to marry Sansa Stark to Willas Tyrell, leading to Sansa's forced marriage to Tyrion. When Joffrey is poisoned at his wedding feast, Petyr has Sansa whisked away from King's Landing in the confusion and takes her to his holdings on The Fingers, disguised as his illegitimate daughter. During the voyage, Petyr reveals that he had conspired with Olenna Tyrell to poison Joffrey and blame Tyrion for the murder. Lysa arrives at Petyr's keep and promptly marries him at Lysa's insistence, although Petyr would have preferred a court wedding. After the wedding, Baelish and Sansa travel to the Eyrie, where he spends much of the time asserting his new authority over the lords of the Vale. While alone with Sansa, he notes her physical similarity to Catelyn and kisses Sansa. Witnessing the encounter, Lysa tries to kill Sansa a short time later. Petyr rushes to comfort Lysa, but reveals that he had only ever loved Catelyn and pushes Lysa to her death. He immediately implicates the only other witness, the minstrel Marillion.