In emails allegedly sent to Denise Richards in the aftermath of their split, Charlie Sheen tells his ex, "Go cry to your bald mom, you [bleep]ing loser." Richards' mother is currently receiving chemotherapy treatment for kidney cancer.

The New York Daily News reports that an anonymous source who claims to have worked with Sheen on his hit CBS sitcom Two and a Half Men sent them a packet including Sheen's emails, as well as pictures of genitals that the star allegedly emailed to women (and per Richards' assertion -- underage boys) he met online.

In another one of the leaked emails, Sheen attacks Richards and her parenting ability. "You are a pig,” he writes. “A sad, jobless pig who is sad and talentless and evil and a bad mom, so go [expletive] yourself, you sad jobless pig."

Prior to the angry emails, Sheen tried to apologize for his behavior in the couple's divorce, Page Six reports. Then, he wrote, "I have been responsible for some of the worst dialogue and venom-spewing behavior in the past few weeks that I can possibly recall, ever. The anger and frustration that our situation has generated is beginning to manifest itself in physical forms and cellular regression."

But now, Sheen's pals tell the Daily News that the leak is just another part of Richards' campaign to tarnish Sheen's reputation, and that she is responsible for the court documents getting out.

Sheen himself has gone on the offensive in response to Richards' claims, releasing in a statement:

"I will not dignify the majority of these allegations set forth by Denise Richards with any measure of response. On its best day it remains laughable and inane...Brooke [Mueller, Sheen's fiancee] and I remain committed to the task at hand. These unlawful and diabolical accusations will not distract us from the focus of our resolve...I am making every possible effort to assure that the courts focus on my children and their welfare. My refusal to dignify garbage needs to be understood in the context of the history of this case and Denise's need and desire to make it about issues that do not involve anything other than her emotions.”

Sheen's fiancee Brooke Mueller adds remarks of her own, explaining the bizarre moment or two where it seemed she and Richards were getting chummy. "Denise urged me to be open to having a friendship with her. After our relationship was established, she tried to get Charlie to father another child and to reconcile with her. Even though her efforts failed, it was disconcerting to be part of the sequel to the Heather and Richie story."