Denise Richards admits going to dinner with ex-husband Charlie Sheen and “four hookers” was an "insane" experience.

Richards has two daughters -- Sam, 7, and Lola, 6 -- with the former Two and a Half Men star; she said she initially thought it was "sweet" Sheen had invited her out for a meal while she was in New York last October, but that the situation got "really crazy" in a hurry.

The evening eventually culminated in Sheen going on a drink and drug-fueled rampage in his room at the Plaza Hotel, allegedly attacking porn star Capri Anderson, who had been one of the dinner guests.

Having Charlie Sheen as an ex-husband and father of two of your children is challenging even at the best of times.

Denise Richards opened-up to Ryan Seacrest this morning on his 102.7 KIIS FM radio show about life in the fast lane with her troubled ex-husband, and RadarOnline.com has the interview.

"I went through so much in a very short period of time in my life and got through it. I really hit rock bottom at one point," Denise revealed, who was married to Charlie for four years before their tumultuous divorce in 2006.