How do I know what court has jurisdiction in my case?
What court has jurisdiction over your case (and subsequent events) is usually based on where the divorce action was (or will be) initiated. If you have an existing divorce decree, the court of jurisdiction is formally noted inside or on the cover page.
If you or the child has moved and now reside in another State, jurisdiction may be transferred for reasons of law or practicality.
If there is a child support order in place, then the local child support agency is normally responsible for enforcing spousal support. If there is no child support order, the local court is usually tasked with enforcing the spousal support order.
What parts of a prenuptial agreement are unenforceable, if any?
Provisions that attempt to deal with child custody, visitation, and child support will traditionally not be enforced. Alimony arrangements will be looked at very carefully, especially if they deny support to a spouse before a final divorce period.