Playboy boss Hugh Hefner has given his blessing to his ex-wife Kimberley Conrad’s affair with rocker Rod Stewart — but he admits that he still loves her, says the British Press Association. Hef, 73, could not predict whether the romance would last, because he thinks both are on the “rebound.” Hefner was speaking while on his first trip to Britain in 28 years. He was in London at a party honoring “Super Vixens” cult director Russ Meyer.