she's dishing! It was just a matter of time! on TMZ: Kim Dishes on Ex Diddy! Posted Aug 7th 2007 4:31PM by TMZ Staff Singin' like a scorned songbird, Kim Porter has gone on the record with OK! Magazinein a tell all Interview about her relationship with Sean "Diddy" Combs. Did she?! She tweets on Sienna Miller, Jennifer Lopez and cheating allegations against her Bad Boy CEO ex. On Diddy: "I'd been in an on-again, off-again relationship with Mr. Combs for about 10 years, and it came to a point where it was time for me to move on with my life. I had invested a lot of time in that relationship, and it wasn't going where it should have been going. So it was time to [end it]. In a relationship, it's important that the people are on the same page at the same time. And we weren't on the same page." On His Alleged Cheating: "I will never sit here and say that Puffy -- or any man -- is 100 percent faithful. I just don't believe it. Some of you are, but I'm not going to sit here and say that I didn't believe that he cheated on me. I would never say that. I'm aware that he's cheated." And on J.Lo's relationship with Diddy: "It was an embarrassment. I never thought it was real. I knew what was going on with him. Despite what you see in print and when the cameras are flashing, what's going on in someone's heart may be totally different. He was still [in love] with me. I never looked at their relationship [as serious]." When asked if Sienna Miller played a part in her break up, Porter states: "They're just friends. That wasn't the cause." The remainder of this tattletale interview will be available on newsstands tomorrow! Get in line!