Maria Shriver Arnold Schwarzenegger Private InvestigatorMaria Shriver is done living in the dark -- she has hired a private investigator to dig into her husband, Arnold Schwarzenegger's, past as she prepares a strategy for her divorce proceedings, according to Radar Online.

Shriver is reportedly suspicious that Schwarzenegger may have fathered more than one extra-marital child -- as many, including those close to the family, say he has.

"The investigator will likely look into the claims that he fathered multiple children, outside their marriage," a source told Radar. "Maria has heard the rumors and she wants to find out one way or another, if those claims are true."