"I said, 'What is that?' I was trying to f**k with her, you know?"
"She (said) that if I got her pregnant, she'd pay me $20 million," Rodman told the radio trio of Charlamagne tha God, DJ Envy and Angela Yee in the studio interview.
"That's if the child was born."
Rodman said after their steamy session he then hopped back on the plane to Vegas and continues his gambling bender.
The five-time NBA champion also speculated that Madonna's eldest daughter, Lourdes, 22, might have been born as a result of a similar arrangement she made with trainer Carlos Leon. The "Like a Prayer" singer gave birth to Lourdes in October 1996.
Though the two-time Defensive Player of the Year and Madonna never had kids together, the flamboyant Rodman has three children to her six.
The seven-time NBA All-Defensive First Team honoree welcomed daughter Alexis, 31, with his first wife, Annie Bakes, in 1988 and shares son DJ, 19, and daughter Trinity, 18, with his third wife, Michelle Moyer.
Madonna has not yet responded to Rodman's claims and is performing shows for her new album Madame X.
