Monster mom Casey Anthony wants to have another baby!

That’s the shocking and bizarre revelation from those at the Orange County Jail in Orlando, Fla., where Anthony, 22, is in solitary confinement and charged with the first-degree murder of her daughter Caylee.

The 3-year-old was last seen in June, but wasn’t reported missing until July 15.

Incredibly, Casey says she wants to get pregnant right away so she can have a baby sister for Caylee when she is found, insiders told The ENQUIRER.

She’s unnerving nearly all in shouting distance of her cell or in the exercise yard when she hollers about needing to get pregnant right now for her missing daughter’s sake.

“She is clearly delusional and doesn’t accept that her daughter Caylee is dead and that she herself is the murderer,” declared a private investigator who recently visited other inmates at the jail.

“She talks about getting out of jail soon and having another baby and starting family life all over again.

“It’s scary. Casey kept saying Caylee will want a sister to play with, so it’ll be a big surprise. Nobody knows what her sicko game is. If it’s an act to convince people she really believes Caylee’s still alive, then it’s very bad theater.”

For more details, pick up the latest issue of The ENQUIRER — on newsstands now!