I have a coworker who signed his rights to a child away(it's a long complicated story) and the mothers new husband was supposed to adopt the child. The judge signed off and he wouldn't ever have to pay child support, he no longer had a legal obligation to the child. Well the adoption never happened and now the mom and stepdad have split. She is now going back after my coworker for child support. Is this legal? He does have an appointment with a lawyer but that's Friday.