Arnold Schwarzenegger’s son Joseph Baena

Maria Shriver confronted her husband’s mistress over suspicions she was secretly raising his love child, it has been claimed today. The mother of four, 55, is said to have asked her family’s housekeeper, Mildred Baena, 50, if her son was fathered by Arnold Schwarzenegger. During the dramatic showdown, Baena broke down and confessed, according to America’s Radar Online. The Terminator star only came clean about the sordid affair after Shriver told him she new the truth about his 13-year secret, insiders say.