In all likelihood it was child support, not part of the settlement. There may have been other circumstances but that is the most likely reason.
I don't think it was child support as they equally share the children.
It sounded fairly complex to me as children were involved, his career skyrocketed while hers fizzled due to being the main carer for the kids.
And, she was going for future earnings too. Don't know if she got that though.
Even now, after everything is supposedly settled, she goes to her lawyer to see if she can get more money out of him.
Equal care still results in child support. The amount isnt fixed, its dependent on the relative incomes and number of kids.