This is an interesting question and changes state by state. In New York and New Jersey, the answer is certainly yes. In New York, as a general rule, a child is emancipated at age 21 unless sooner emancipated. In New Jersey, a child is not emancipated until they turn 23 for educational purposes, but both in New York and New Jersey, selections can be made that will enable you to force the support of your child by your spouse. This is an important question that you should specifically discuss with a lawyer because that answer changes state by state.