The tall beauty claims she knew the rapper was unfaithful during their relationship.
Porter never fully trusted Diddy and was "aware" he cheated on her.
She told America's OK! magazine: "I will never sit here and say that Puffy -
or any man - is 100 per cent 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."