A fuming mistress catapulted retribution into a new orbit by plastering the country with billboards that show her nuzzling a married New York business honcho and adviser to President Obama, sources said. The spurned squeeze, YaVaughnie Wilkins, went nuclear after she learned that Charles E. Phillips -- president of tech conglomerate Oracle and a member of Obama's Economic Recovery Advisory Board -- reconciled with his wife despite his lengthy affair with Wilkins. Three signs have popped up in the city, as well as one in Atlanta and one in San Francisco -- where Wilkins lives, Phillips owns a home and Oracle's world headquarters are located. The very public humiliation campaign may have cost Wilkins upward of $250,000, at an estimated $50,000 a pop. Court records show that Phillips' wife, Karen, filed for divorce in February 2008, but no action has been taken on the filing since that year. The couple recently made up, a source said. "I had an 8½-year serious relationship with YaVaughnie Wilkins," Charles Phillips said through a spokesman. "The relationship with Ms. Wilkins has since ended, and we both wish each other well." One of the giant signs, posted prominently at the corner of West 52nd Street and Broadway, near Times Square, declares "Charles & YaVaughnie," and shows the couple beaming.