My youngest son turned 21 on Sept. 21, 2008. I have paid all court mandated child support for many years, plus half of what ever expenses his mother presented to me. (Expenses such as paying for half of the son's new car, half of all college expenses, and many others.) Now his mother is serving me papers to go back to family court. She claims I have not paid enough over the years and is demanding more. Is there any loop hole in the law that would allow this to actually happen?