Child support checks arrive on a schedule, but the bills don't stop there. Between school supplies, sports fees, orthodontist visits, and the occasional emergency vet bill for the family dog your kids insisted on, it's easy to wonder what that monthly payment is actually meant to pay for — and what you're expected to cover on your own. If you've ever asked your ex to split the cost of cleats or a class trip and been told "that's not what child support is for," you're not alon