Hell hath no fury like a woman scorned -- and then there's this lady.
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.
PHOTOS: YAVAUGHNIE WILLINS AND CHARLES E. PHILLIPS
Referring to him by his initials, the three-story-tall ad proclaims, "You are my soulmate forever - cep."
But the billboards, first reported by Gawker, are only half the tale -- they also invite the curious to go to a Web site that is a veritable shrine to Wilkins' ex-love.
Featured on www.charlesphillipsandyavaughniewilkins.com
are eight years' worth of photos of the pair canoodling around the world, dating to 2001.
Phillips, 50, and Wilkins, 41, a writer and actress, can be seen standing arm-in-arm on the Great Wall of China at his 2005 birthday celebration, and posing in Sydney wearing matching "Australia" jackets.
Also included are dozens of ticket stubs from concerts, movies and sporting events -- as well as Obama's inauguration.
One of the photo albums, from 2001, is set to a karaoke rendition of Smokey Robinson's sexy "Cruisin'." A woman and man bellow the lyrics, "This is not a one-night stand."
There is also a huge collection of notes from Phillips. "You're all that matters to me," he coos in one.
In another, he gushes, "I have never met a woman as fascinating as you. You are exactly what I've been looking and waiting for."
"Charles, You have my heart forever -- I love you so much," Wilkins writes.
California Web-site designer Bela Kovacs said Wilkins forked over "about $1,400" last August to build the site as "a present for Charles."
"She was really happy with it when it was finished" in October, he recalled.
Each of the photo albums -- one per year -- is set to music, much of it karaoke Wilkins said was recorded by her and Phillips. Kovacs said Wilkins gave no indication that the site would be used to embarrass Phillips.
"She seemed very straightforward, very intent on putting together something nice for him," Kovacs said.
"I wasn't sure if it was her boyfriend or her husband, but it certainly wasn't like it was a secret relationship."
Phillips who lives with his wife and their son, Chas, in an Upper West Side brownstone, said, "Oh, man," after The Post knocked on his door yesterday.
"I'm sorry," he said before closing the door.
Karen Phillips' divorce lawyer didn't return calls. Wilkins did not return calls or respond to an e-mail. Oracle also didn't return calls.