Discovery

P. Diddy’s baby mama Kim Porter is speaking out about their decade long relationship and she’s not holding back.

Kim says she knows he cheated on her and she also calls his relationship with J-Lo an “embarrassment.”

Porter kicked him to the curb last month amid claims he was cheating with Sienna Miller.

She sat down with OK! magazine to dish the dirt.

Regarding the reasons for the break-up she says, “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.”

Amen to that sister, we’ve all been there. But it is a little easier to walk away when your baby daddy is a billionaire.

She also says she know her man strayed adding, “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.”

Diddy broke up with Porter in the middle of their relationship to have a fling with J Lo before running back to her.

She says of their relationship, “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].”

Kim claims that although he has cheated in the past, Sienna wasn’t a factor in their breakup this time around.

She adds, “They’re just friends. That wasn’t the cause.”

Hmmm…let’s hope that’s the case.

Although Diddy and Sienna insist they’re “just friends” the two were spotted partying in Ibiza last night before heading back to her villa in the Mediterranean.