I heard today on the radio (I'm trying to find the link) that her husband, Peter, was having an ongoing fling with a 19 year old he met last year in a TOY STORE WHILE SHOPPING FOR TOYS FOR HIS KIDS....UGH. Apparently he hired her as an assistant for his company soon after they met. He bought her a car, and gave her money and paid for a place for her to live. Her 19 year old ex-boyfriend was the one who told her father who then told Christie Brinkley.
Apparently there is some trail of e-mails confirming all of this that Christie found on her computer.