She says the 84-year-old Playboy magazine founder is "making a hasty decision" by getting engaged to 24-year-old Playmate Crystal Harris.
Madison tells Life & Style she arranged a meeting with the couple after reading on Twitter that Hefner had proposed. The meeting was filmed for her "Holly's World" reality show on the E! cable television channel. She says it was "definitely awkward."
Madison says she wished the couple the best but told them Harris had better not do Hefner wrong or she'll "kick her butt."
The 31-year-old Madison and Hefner dated for six years until their breakup in 2008 because she wanted to get married and he didn't.
This would be the third marriage for Hefner. He divorced another Playmate last year.
