Maria Shriver may not have kept the news of her husband's love child to herself after all. TMZ reported on Tuesday that Shriver agreed to remain mum on the subject until the couple announced they were separating, but afterward disclosed the scandal to The Los Angeles Times, which broke the news. Radar Online, meanwhile, reports that Shriver has now hired a private investigator to trace rumors and tabloid claims that Schwarzenegger may have fathered other illegitimate children, and to examine his personal finances. Shriver and Schwarzenegger are estimated to have joint assets of $200 million to $400 million, which means their divorce could be one of the most expensive in celebrity history. Though they allegedly signed a pre-nup, charges of infidelity may override the agreement in court.