Kim Porter knew ex-lover P. Diddy was unfaithful during their relationship. Porter - who moved out of their apartment last month - never fully trusted Diddy and was "aware" he cheated on her.

She told OK! magazine: "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."

The model-and-actress - who had three children with Diddy during their 10-year on-off relationship - also branded the hip-hop star's romance with Jennifer Lopez fake and "embarrassing."

Porter - who had split from Diddy, real name Sean Combs, before he began dating J.Lo - said: "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."

Porter slammed reports her relationship broke down because of Diddy's close friendship with Sienna Miller, insisting she ended the romance because they wanted different things.

She explained: "They're just friends. That wasn't the cause."

"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."

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