In my contract it states that my son will receive child support till he is 18. In an office meeting with my ex's lawyer years ago, she (lawyer) stated "or until he graduates High school". Is this whatever happens first or until both are satisfied? My son has an IEP and his challenges caused us to give him a pre school start when was younger. Thus he is a year older than normal and will not graduate till he is 18 +. He is a junior and will turn 18 in the spring of 2014.