There would be no child support unless it was court issued. Child support would come from the parent (of the baby) that isn't in custody of the child, mother or father. In your questions case, if the father is actually in the picture and helps the mother take care of the child 100%, then why would there need to be child support? However, if he's not, then you'd have to go to court to get child support, but I don't think you can even do that seeing as how both parents are underage. If he was 18 or older, then I'm pretty sure you could get it, but not since he's 16.