Article continues below advertisementGeorge Clooney has been left "absolutely furious" over claims in Virginia Giuffre's posthumous memoir that Ghislaine Maxwell once boasted of performing a s-- act on him during a Hollywood party, according to sources close to the actor.The 64-year-old Ocean's Eleven star is said to have been "boiling with anger" at what friends describe as a "grotesque fabrication."The allegation appears in Giuffre's book Nobody's Girl: A Memoir of Surviving Abuse and Fighting for Justice, published earlier this month following her death from suicide at 41 in April.