She used a complicit media to lie thru her teeth. The media ate it all up. They hated him. Still do.
Most couples deserve each other.
Balderdash
Here's some of the details leading to the divorce----which was reported in excruciating detail in NYC print and broadcast media.
Rudy threw himself into the Playboy "Sex is Everything" lifestyle, early-on as he searched for perfect extra-marital sex (while he was mayor, and while he was still married).
Within six months of being elected Mayor, Rudy's photo was splashed on the front page of the New York Daily News buying clothing for Christyne Lategano, his "mayoral aide" (that's kinda like being a WH intern but with New York-style kneepads).
Giuliani in heat was anything but subtle. He took girlfriend Lategano to baseball games WITH his kids, until his wife had had it----news pictures still exist of Lategano and the married Mayor in restaurants across the city (not having sex, though. That came after the photogs left, and in City Hall, no less, according to Hanover's own eyewitness report after a surprise visit to her husband's City Hall office).
Lategano may have been hot in a tight clinch, but she was widely disliked for her rank incompetence and arrogance. Giuliani finally dumped her for newer sexual thrills, but she got paid off for heating up the Mayor's libido with an apartment and a cushy city job, arranged when Rudy dumped his appointee and loyalist, liberal honcho, Fran Reiter, from the job so Lategano could run the city's Tourist and Visitor's Bureau at $250K a year.
By 1998, Rudy had a new mistress (now his wife) and apparently was in the throes of sexual Valhalla, getting sexually blitzed every chance he could as a busy big-city Mayor. He took his sexual plaything to a restaurant a few blocks from Gracie Mansion--so that his children and their friends would know about it. By 2000, Rudy's sex life was getting lots of newsplay. Married Rudy was squiring his mistress to city parades and other Mayoral public events. (As one astute FReeper noted---goodness, gracious, great balls of fire. The thrills just never let up for the gun-grabbing mayor.)
Rudy then called a press coonference to publicly announce his separation from his wife EXCEPT THAT HE HAD NOT BOTHERED TO TELL HANOVER BEFOREHAND. Nice guy. Rudy then publicly announced to the press his separation from his wife WITHOUT EVEN TELLING HANOVER. At the time, Rudy was taking his mistress---not his wife--- to cancer treatment sessions. He never bothered to tell his wife about his illness. Rudy then decided he could not live with his sex playmate out of his reach, and planned to bring his mistress into the Mayoral home (on the spurious claim that Hanover wasn't helping him through cancer treatments---an illness he had not even bothered to tell his wife about).
Rudy announced he wanted to "divide the mayoral home" in two, for his wife AND mistress---a transparent ploy to force his wife and children out into the streets. Hanover was forced to go to court to declare Gracie Mansion the marital home so as to exclude Rudy's sex playmate. The judge acquiesced to Hanover's plea.
Thwarted but not defeated, Rudy moved in with a happily civil unioned gay couple (apparently also in the throes of sexual blitz-dom), while his wife fended off his relentless efforts to ditch her. On Mother's day 2000, while still married, Rudy publicly paraded his mistress up and down Second Avenue for newspaper pictures. The evilness of this marital betrayal astonished even blase New Yorkers.
Giuliani's vendetta against his wife and children was still not sated. He cut the mother of his children's official security detail......but he provided government security to his mistress who had no {{ahem}} official duties unless you consider getting Rudy sexually blitzed to be an "official duty".