[+/-] Sharon denies, but someone else was there

More blow-by-blow over W coke tale (pun intended)...

Sharon says, "'I categorically deny that I ever told Kitty Kelley that George W. Bush used cocaine at Camp David - or that I ever saw him use cocaine at Camp David.''

But Sharon has one small problem: There was a third party at the lunch who says Kelley's quotes are accurate.

"We met at the Chelsea Bistro on April 1, 2003," says the insider. "It was a very long lunch. Sharon was talking about affairs in the Bush family ... [that they are] very dysfunctional. She said they talk about family values, but they don't practice what they preach. Then Kitty raised the drug issue. Kitty, who can make a rock talk, said: 'I know about the drugs. I know that W did drugs at Camp David during his father's presidency.' Sharon agreed. She said, 'Absolutely. That's all true.'"