There's all sorts of speculation - he cheated on her, she cheated on him. Anyways, they broke up and their divorce was all over the tabloids for months. He started dating the daughter of the plastic surgeon who did her tummy tuck (they've now broken up and THAT was all over the tabloids too), she did Dancing With the Stars...it was an ugly breakup that was played out for the entire world to see. Neither one of them came out of it looking very good, and now there's stories in the tabloids about the children rebelling and being expelled from school...
Very sad, because they were a really cute family in the beginning and I loved watching them.