It looks like recovering cad Charlie Sheen may have suffered a relapse. Denise Richards has filed for divorce from the Two and a Half Men star after three years of marriage. Citing irreconcilable differences, Richards — who is six months pregnant with the couple's second child — is seeking full legal and physical custody of the children. They also have a 1-year-old daughter, Sam. The couple released a joint statement saying, "We are deeply saddened by the recent events and out of our love and concern for our daughter Sam, our unborn child and each other, we ask that you respect our privacy at this difficult time." According to Celebrity Justice, Richards has retained A-list attorney Laura Wasser, known for representing some of Hollywood's most powerful men. Translation: Sister-friend is out for blood!