Christie Brinkley Opens Up About Heartbreaking Discovery of Her Ex-Husband’s Affair

At the age of 71, Christie Brinkley shared an emotional recount of how she uncovered her ex-husband Peter Cook’s infidelity during the recording of her memoir, Uptown Girl. She nearly broke down in tears while describing the moment she discovered Cook’s affair with a teenager, a revelation that devastated her.

Brinkley explained that her publisher allowed her to show raw emotion, letting her voice crack and reveal her true feelings. One of the toughest parts to record was when she found out about Cook’s betrayal right after giving a graduation speech in 2006. According to Brinkley, a man in the audience, who identified as a police officer, tapped her on the shoulder, revealing that her husband was having an affair with his teenage daughter. The shock nearly overwhelmed her, and she struggled to get through recounting it.

During the telling, Brinkley recalled asking her then-husband to repeat the news, and looking at her son Jack — adopted by Cook — she saw his face frozen in panic, sensing the gravity of the situation. The revelation profoundly affected her, nearly breaking her apart.

She also detailed her tense custody battle with Cook after their divorce, which was finalized four years later. Brinkley’s marriage to Cook lasted ten years, and they share two children: Sailor and Jack. She was previously married to Billy Joel, with whom she shares daughter Alexa Ray, and addressed Joel’s struggles with alcohol and infidelity in her memoir.

Despite the painful end to her marriage with Cook, Brinkley maintains a close friendship with her ex-husband. She reflected on her decision to include the affair in her memoir, stating it was a way to show what she endured during those difficult years and to illustrate her resilience.

Her story highlights the emotional toll of betrayal but also her strength in overcoming personal heartbreak.