Did you read the "The week after he married me, he went to Los Angeles and slept with this girl Lisa Moorish, and got her pregnant. What a ****!" bit? The week after he married Kensit he screwed Lisa. Not really PK's fault.
No, not her fault, but she was happy to cheat with him when he was with Lisa. I can't imagine Lisa Moorish felt she owed Patsy anything.
But ultimately it's all Liams fault. It doesn't really matter how well any of these women behaved, it's LG who was failing to keep it in his trousers.