August 28, 2007 -- Paula Zahn's teed-off hubby didn't know that steamy sex trysts between his wife and an old pal were par for the course for years. Maybe he should have. [snip] "Richard feels betrayed," one pal said - and he only found out the truth from a tell-all manuscript Zahn wrote that documents her relationship with ContiGroup CEO Fribourg. "It's a lurid and shocking handwritten account of their relationship," said the friend, who asked not to be identified.[snip] Zahn, 51, and Cohen haven't yet filed divorce papers, and Cohen's friends said he thought they were trying to work...