Denise Richards is a big liar, claims actor Charlie Sheen’s friends — one of whom says she “gets more than enough money from Charlie to never have to work, much less do a reality show that exploits the kids,” reports.

Sheen and his friends are furious the actress has taped a reality show debuting this weekend on E! called It’s Complicated, which also features the ex-spouses’ two daughters, Sam and Lola.

In her bid to promote the show, Richards went on Today, The View and Larry King Live to explain she did it to make money to support her children.

But, “Denise gets $52,000 US a month tax-free in child support,” a Sheen insider fumed. “Most people in America can figure out how to live on that, but Denise can’t?”

In addition to the child support, Richards got $60,000 a month (also tax-free) for two years in alimony — adding up to $1.44 million. Richards also gets a chunk of Sheen’s sitcom, Two And A Half Men, which “eventually will net her up to $25 million,” the source said.

Earlier this week, Sheen released e-mails purportedly sent from Richards to his fiancée, Brooke Mueller, in which Richards states she wants another baby and had asked for a sample of his sperm. But Richards said on Today that those “made up” e-mails were not from her.

A rep for Richards didn’t return calls.

A rep for Sheen released a statement saying, “The mere fact that she continues to publicly discuss and harass both Brooke and me three years after our separation, which for the record is longer than the actual length of the marriage, is beyond desperate and speaks volumes.”