No, you cannot have it annulled: lying about prior relationships (even marriages) is not the type of marital fraud that allows you to annul marriages (the main ones are about the purpose or reason for marriage--i.e. a lie about wanting children, which is core to marriage; or lying about wanting to be married when all the person really wanrts is a change in immigration or residency status). Lying about past relationships is so common (though admittedly, your case is more extreme than most) that if this was a reason for annulment, almost all marriages could be annulled.You may divorce her, however.