<P> Upon her arrival in Budapest, Dominika lives with Marta Yelenova, another Sparrow . Her boss in Budapest is Maxim Volontov . Dominika quickly makes contact with Nash, who correctly determines that she is a Russian intelligence operative . Dominika reveals her true identity to him, as well as her motive to find out Marble's identity . Dominika inspects Marta's room, and realizes that she is working to gather information from Stephanie Boucher, the chief of staff to a U.S. Senator . Dominika claims to her uncle that she is helping in Marta's effort to gather information from Boucher . </P> <P> Dominika offers to work for Nash as a double agent . She carries out Marta's assignment to meet Boucher, and covertly exchanges the supplied information for CIA - supplied floppy disks . On leaving the meeting place, Boucher sees American agents and is spooked . She unintentionally steps into traffic and is killed . Russian agents observing Boucher realize that the mission had been compromised . Dominika and Volontov are required to immediately return to Moscow . She is tortured and interrogated for days . Dominika returns to Budapest, and informs Nash that she wishes to defect with her mother to America . </P> <P> After spending the night with Nash, Dominika awakes to find him being tortured by Matorin, who is attempting to discover the identity of Marble . She initially helps Matorin torture Nash, but turns on the executioner and kills him . She wakes in a hospital where General Vladimir Korchnoi reveals that he is Marble . He explains that he was initially patriotic, but grew to feel that Russia was corrupt . He fears he will be caught soon, and instead of dying in vain, instructs Dominika to reveal his identity to Ivan . She could then replace him as a mole and further their work by passing information to the CIA . But when Dominika contacts her superiors to reveal the identity of the mole, she frames her uncle Ivan rather than betray Korchnoi . Ivan is killed by the Russian side during a spy swap, and Dominika is congratulated for her work by her Russian superiors . </P> <P> Back home in Russia, Dominika lives with her mother, and receives a phone call from an unknown person who plays Grieg's piano concerto that she had listened to during her love affair with Nash . </P>

Who was the actual mole in red sparrow