TMZ has obtained the UNBELIEVABLE photos of Octomom whipping a grown-ass man dressed up as a baby in some kind of weird FETISH shoot.
Octo -- who STUFFED herself into an ultra-skin-tight corset -- is crackin' the whip on a guy named Tattoo ... an L.A. radio personality featured on Rick.com.
The eerily-erotic madness takes place all over Octo's La Habra home ... with Tattoo posing with her kids' horsey and inside their play castle.
We're putting a VIDEO presentation together for tomorrow when you wake up ... YOU'RE NOT GONNA WANNA MISS THE FOOTAGE!!!!