Porter left Diddy over baby rumours

Sean 'Diddy' Combs' on/off girlfriend Kim Porter has confirmed that reports the rapper impregnated another woman shortly after the designer gave birth to the couple's twin daughters led to the end of their relationship.

Porter refuses to confirm or deny gossip suggesting an Atlanta, Georgia woman is expecting Diddy's baby, but admits the reports were a major factor in the couple's shock July split.

She tells the upcoming October issue of Essence magazine the scandal led her to question whether or not she could trust her boyfriend. She decided she couldn't, and it was time to move on.

When asked directly if the rumours about Diddy's infidelity led to the split, Porter says: "Hmm… Well, that definitely was part of it."

And, despite new reports the couple are planning a reconciliation, Porter insists she'll never wed the rap mogul.

She tells the publication: "He's not ready to get married. When I get married, I want to stay married.

"I want both parties to be on the same page at the same time, and to leave a certain type of behaviour behind. That's a commitment I don't think he's ready for."