Hugh Hefner’s number one girlfriend Holly Madison has sparked reports she’s pregnant with the 81-year-old’s fifth child by crying off TV interviews in Monaco with a morning sickness and refusing to party with her fellow bunnies.

The pretty Oregonian, 27, created a storm of speculation at the Monte Carlo Television Festival earlier this week, where she has promoting reality TV show The Girls Next Door with Hefner’s other girlfriends Kendra Wilkinson and Bridget Marquardt, by missing parties and covering up.

While her ...