Peter Cook blames his ex, vintage supermodel Christie Brinkley, for his stepping out with a teenage Lolita. “I was seeking a connection I could not find in my own marriage. I think the emotional aspect of our lives had changed,” the newly divorced single dad told Barbara Walters in a new “20/20” interview. “I think we were both feeling more like we were living with a brother and sister than a life partner. I wanted a little acknowledgment, a little attention, a little thank you every now and then for my efforts, for the amount of time I took to care for her and my family, for the wealth I was building.” One word: Jerk.