(CNN) The former mistress of former Republican National Committee Finance Chairman Elliott Broidy, who signed a $1.6 million agreement that included a confidentiality clause to keep their affair quiet, is suing Broidy for failing to pay the third installment of that money.

Broidy was paying former Playboy Playmate Shera Bechard in $200,000 installments for an unspecified personal injury in a deal that included a nondisclosure agreement.

Broidy's attorney recently argued their agreement was made null and void after Broidy's affair with Bechard was leaked to the press. The lawsuit against him mentions a Wall Street Journal article that quotes Broidy's lawyer Chris Clark as saying, "Elliott specifically was paying for confidentiality that would shield his family from the embarrassing mistake he made. We can prove there was an intentional breach that renders the contract null and void."

Broidy isn't the only one being sued by Bechard.

Bechard's lawyers with the Stris & Maher law firm had the complaint sealed for 20 days but highlighted reporting from The Wall Street Journal revealing the breach may have come from two lawyers: Bechard's former lawyer Keith Davidson and Stormy Daniel's current lawyer Michael Avenatti.

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