The beauty of it is she gets $400 million AND gets rid of the jerk!
She doesn’t really get rid of him.
He’s the father of her children. She will still have dealings with him for the remainder of her life. As her children grow older, those contacts with him will be less frequent and less important.
But, she’ll never get back all of those years of her life. Nor will she be able to change who fathered her children. They’re bound on this earth forever, whether she likes it or not.
There will never be a day of her life where she doesn’t think of him and remember their marriage.
It is sad that it ended this way... especially for the children.