Once Denise Richards started airing her grievances, it apparently became difficult for her to stop.

The actress, who's currently in the midst of an ugly divorce battle with Charlie Sheen, already spoke out in court papers about some of the specific issues she had with her estranged husband--the alleged death threats, kiddie porn addiction and dalliances with prostitutes, to name but a few.

Now she's taking her former best friend, Heather Locklear, to task over Locklear's supposed "betrayal."

"Heather knows why we aren't friends," Richards told TMZ.com.

The obvious reason for the end of the friendship would seem to be Richards' reported romantic involvement with Locklear's estranged husband, Richie Sambora, whom the former Melrose Place star is in the process of divorcing.

Locklear's rumored beau of the moment, David Spade, seemed to perpetuate that speculation when he told reporters last week that Locklear was "still nursing the knife wound in her back."

However, Richards claims Locklear knows "that there was nothing that happened during either marriage."

"Heather knows why and when her marriage ended with Richie and she knows why my marriage ended with Charlie," she told TMZ.com.

"It is a betrayal because a lot of it isn't true and they know that and that's what's hard."

Locklear, thus far, has refrained from making any public statements regarding Richards and Sambora.

As for Sheen, he recently told Extra that he was "horrified" by the allegations Richards made in her recent court declaration and that she had "radically violated" their agreement not to discuss the details of their divorce publicly.

"It's the most vile attack I've ever witnessed, period," he said.

"Why was I allowed any contact, on any level, with her or the children for the past year? Why, if that's who I am?" he asked.

Richards, on the other hand, told TMZ.com she was under oath at the time she made her claims and stands by her declaration.

"This is one of the hardest times in my life," she told Us Weekly. "I have done my best to try and keep this private. It's unfortunate that the court document became public. My priority all along has been to focus on my children and their well-being."

Apparently believing the warring couple could use a little parental guidance, Martin Sheen weighed in, calling for a "cease fire," and telling Access Hollywood he had "every confidence that Charlie and Denise will eventually become friends."