The young woman who has contributed to the separation between Christie Brinkley and Peter Cook may be called to testify during the estranged couple’s upcoming divorce trial, or so says her attorney.

Former model Christie Brinkley married architect Peter Cook in 1996. Ten years later, she was filing for divorce, once the relationship unfortunately came to a sad end, after her husband’s extramarital affair with his assistant, then 18, was revealed.

It is this assistant, the now 21-year-old Diana Bianchi, who will be a star witness once the public divorce trial begins July 2 in Long Island.

Bianchi’s attorney, Joseph Tacopina, told the New York Daily News that he thinks his client’s “episode” with Cook was “one of the catalysts” for the divorce.

“All I can say is that if she is called to testify then she’ll testify truthfully,” Tacopina added.

Tacopina also stood up for his young client, describing her as a “composed young lady” and a “young girl” at the same time.

He also said being in the spotlight for the relationship with Cook has been a struggle, “a difficult situation” that she wished to put behind in order to pursue her dreams of becoming a singer.

Brinkley meanwhile has been keeping her head high. This weekend, attending the American Heart Association’s annual gala in the Hamptons to accept a humanitarian award, the former model told People magazine that she had plenty to be grateful for: “so many wonderful friends, my family.”

“My friends have been my support. I am so lucky to have them all,” the 54-year-old mother of three said.