The actress, who shares two daughters with the actor, wed Aaron Phypers in September (2018), and during a recent "The Real Housewives of Beverly Hills" reunion show, Denise told host Andy Cohen her current husband even called her ex to let him know they were getting married.
"Aaron called Charlie to let him know that we were getting married, just out of respect - that he was going to be a stepdad to our girls," she said. "They get along."
Richards and Sheen faced off in a series of nasty court battles following their split in 2005, but the former couple has patched things up for the sake of their kids Sam, 15, and Lola, 14.
"He's (Sheen) my daughters' dad and we've been divorced for 14 years," Denise shared. "Everything was so crazy. It did get crazier (after our divorce), and I didn't want our daughters to be privy to anything that was negative, to anything that was going on in his life."
Sheen, who has been diagnosed with HIV, had a very famous public meltdown after his bad behaviour cost him his job on TV comedy "Two and a Half Men".