A marriage contract not only does not require children, it doesn't even require an intent to have children. 80 year olds are welcome to marry each other in America even though they will never procreate together. First cousins in Wisconsin are welcome to marry each other- if they can show they will not have children.
The reason Wisconsin requires the "show you will have no natural children" law is because they know the marriage contract includes children and such close blood relations procreating would harm the offspring. The offspring. The children. The law isn't about the adults, it's about protecting children.
A marriage contract does not require children but it has to be constructed as if they would appear, since children is why societies have marriage. And as such, children are implied parties to the contract. Contract law was violated when they were barred from the discussion last Spring. So, mistrial and redo. You shouldn't fear that after all Syriusly because you of all people would want children to have a voice in what is best for themselves on this quesition, right? You of all people should be advocating that they at least got to speak at the table on a contract so vitally connected to them that was up for revision, yes?
80 year olds are potential foster parents or grandparents. Sterile heteros are potential moms and dads too. This is all about moms and dads with children as an inseperable concept from marriage since its inception thousands of years ago.