Hef’s ex-girlfriends were unhappy with him - Sara Jean

London (ANI): A former Playboy Playmate of the Year says that it was Hugh Hefner"s strict needs and harsh curfews that made all his previous girlfriends to walk out on him. Sara Jean Underwood, who won the title in 2007, has said that all three 'Girls Next Door" stars—Kendra Wilkinson, Bridget Marquardt And Holly Madison—were unhappy with Hefner and the discipline he imposed on them.

And that"s the reason why they all ended-up dumping the 82-year-old Playboy mogul. “They"re young girls and they should be out there partying, but they had strict curfews and had to be in by nine o"clock," the Sun quoted her as saying. She added: “Had they stayed, none of them would have been happy."

Sara herself stayed at the Playboy mansion for almost three years, and eventually moved out in August 2008 to return to university. And now she"s said: “I went home when it was a really good time to leave,"

Meanwhile, Kendra is all set to marry NFL star Hank Baskett, Holly is dating illusionist Criss Angel, and Bridget has said that she"s enjoying being single again.