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Booze, coke and rehab – just another day in the light of Charlie Sheen & Brooke Mueller, right?  Wrong.  Here’s comes the gal who says she had a 3-way sex romp with the hard partyin’ duo. confirmed with a source who has direct knowledge of the situation that a woman who has slept with both Charlie and Brooke at the same time will be coming forward to reveal salacious details of their uber-kinky relationship.

"Brooke IS bisexual," another insider told the celeb website. "She and Charlie have had more than one woman share their bed in the short time they’ve been married."

Brooke is being treated for crack cocaine and alcoholism. Charlie had been using cocaine and also started boozing again, just entering rehab yet again last week.

"Some of the women they slept with together also did drugs with them," the insider divulged.

In case, you forgotten Charlie’s free wheeling boozy, drug and high-priced hooker addiction helped end his relationship with former wife Denise Richards who, as The ENQUIRER previously reported, may be called to testify for the prosecution in Charlie’s assault case in Colorado.