DETROIT (AP) -- Ex-mayoral aide Christine Beatty pleaded guilty Monday in a text-messaging sex scandal with former Mayor Kwame Kilpatrick that gripped the city for nearly a year. She will spend four months in jail. "I lied under oath," a tearful Beatty told the judge, echoing the words her former boss, Kilpatrick, uttered in a courtroom during his own guilty plea three months earlier. Both admitted lying when they claimed they were not romantically involved. They were both married at the time. Beatty, 38, pleaded guilty to two obstruction of justice charges. Under the deal with prosecutors, she will be...