Sounds like the case of "On the Road" reporter Charles Kurault who had a secret 30-year affair with a woman in Montana. He bought a ranch and built a home for her, and when he died, OW sued his estate for the ranch -- and won! Kurault's wife even had to pay the taxes!
Reading the Larry King transcript gave me the creeps. Kurault called OW EVERY night, went to her kids' graduations, etc. They all acted like he was part of the family - and didn't mind when he went home to his wife and LEGITIMATE family.
