"Other Woman" in Brinkley Split Speaks

Diana Bianchi, now 19, told WNYW, the FOX affiliate in New York, that she met the 47-year-old Cook in May 2005 when Bianchi, then 17, was working at a toy store in the Hamptons. Bianchi says Cook offered her a job at his architecture firm. Within a month, she says, things turned sexual.

"He'd make advances verbally towards me first," Bianchi told WNYW's Rosanna Scotto. "It just escalated into something I didn't expect ... I never expected that he would take it to a different level."

Bianchi knew that Cook was married, but says that Cook never made her any promises. "He didn't say he was going to leave her. He just basically left it at he wished things were different. He wished that he was younger or he had met me at a different time ... I never asked him to leave her for me."

At one point during the interview, Bianchi's attorney stepped in, saying that Cook "preyed on her vulnerability, her naïveté, her age, her immaturity."

Bianchi says Cook would leave money for her, even providing a down payment on her car.

Brinkley and Cook have been married for a decade. Bianchi could be a key witness in the couple's divorce case, with a reported $60 million on the line. Bianchi's lawyer, Joe Tacopina, says his client has "got a great sexual harassment claim" against Cook.

Photo gallery:
Christie Brinkley and Peter Cook