"Ron Meyer held a screening of 'Borat' at his house for a bunch of people, including Pam and Bob," says an Anderson pal. "It was the first time Bob had seen the movie, and, well, he didn't like it."

The hugely popular film shows Sasha Baron Cohen - in character as Borat Sagdiyev - falling in love with Anderson after seeing her in a "Baywatch" rerun, then driving across America in order to propose marriage to her.

Her friend tells Page Six, "Bob started screaming at Pam, saying she had humiliated herself and telling her, 'You're nothing but a whore! You're a slut! How could you do that movie?' - in front of everyone. It was very embarrassing.

"Pam thought he could have a sense of humor about the movie. She was in on the gag from the very beginning and loved doing the movie. And on the eve of what was supposed to be a very positive thing, he made it an awful night.

"Ever since that night, it has been icicles between them," the friend relates. "Bob is just a very unhappy and angry man. Pam is very disenchanted and sad. You know, there are reasons why she never married him before. Those reasons disappeared while they were together on a boat in St. Tropez, but she knows now that they never went away. The reality is he is an insecure, angry man."