Former marrieds

Charlie Sheen

and

Denise Richards

are getting along so well he’s even appearing on her reality show — and sources say he loves playing happy family with her and totally crushing on the hottie all over again!

“Charlie’s always considered her to be his true love and the one who understood him the best,” spills and insider. “Of the thousands of lovers he’s had, Denise was on top.

“They went through a lot of nasty stuff in the earlier years, but they’re good friends now and coparenting peacefully!”

Their blended brood includes their daughters, Sami, 21, and Lola 19, Denise’s daughter Eloise, 13, who she adopted as a single mom, and Charlie’s 16-year-old twin boys, Bob and max, with his ex-wife Brook Mueller. Charlie is also dad to daughter Cassandra, 40, from an early relationship.

Now that they’re in a good place following their 2006 divorce after a four-year marriage, sources say it’s not surprising that Charlie is appearing on his former missus’ new reality show, Denise Richards & Her Wild Things.

“Denise is thrilled to have him on the show — it’s nice for their girls, too. She must know there’s nothing he wouldn’t do for her,” blabs an insider.

Of course, Charlie, 59, is aware the 54-year-old bombshell’s current hubby, Aaron Phypers, 52, is No.1 in her life, says the source.

“Charlie won’t be disrespectful and make a move while she’s with Aaron,” tattles the source. “he’s grown a conscience in the years since he got sober. But he’ll wait for the slightest sign of trouble and then see what happens. He would love another chance with her.

“In the meantime, he can continue to drool over Denise’s OnlyFans pictures!”