Bianchi says Cook showed interest in her and she reciprocated until their relationship ended in late 2005.
Cook tells the Fox News Channel in a Sunday interview if he had the chance to do it again he'd say: "No, I'm a married man."
Brinkley and Cook's divorce trial ended Thursday following a week of testimony about Cook's affair and online porn habit.
Brinkley gets custody of their two children and properties. Cook gets $2.1 million.
Cook says he's satisfied with the agreement.