She stood by him for 10 years, even forgetting all about that J. Lo thing, but Sean "Diddy" Combs' long-suffering girlfriend, Kim Porter, is finally moving on. According to the New York Post, the mother of three of his children (Christian, 10, and twins D'Lila and Jessie, 7 months) has moved out of his New York apartment and won't be coming back. "Kim is in Louisiana filming a movie right now and when it's done, she's moving to LA," says an insider. "They are the best of friends, but they just can't be together now." It's rumored that Diddy's close friendship with Sienna Miller may have contributed to the split. However, Diddy's rep denies everything: "There is no truth to this."