Sanford had attempted at reconciliation, but filed for divorce two days after state lawmakers decided against impeaching Gov. Mark Sanford. She cited adultery as the grounds for the divorce.
Sanford said that she discovered his infidelity when she found a letter he had written to his mistress. Unlike other political wives had done, she did not stand by her husband when he publicly admitted to the affair, the Wall Street Journal reported.
In August, Sanford moved out of the governor's mansion, taking the couple's four sons to the family's beach house on Sullivan's Island.
According to the New York Times, Gov. Mark Sanford has faced a series of ethics violation charges, calls for resignation and efforts at impeachment.