Family Law is one of the areas that varies greatly from State to State. You should contact an attorney licensed to practice in Indiana and explain the situation. I get the sense there is more to this story than what you are indicating here.
A paternity affidavit and name on the birth certificate establishes paternity without the need for further DNA testing; however, it does not adjudicate rights such as custody and parenting time to the father and child support for the custodian. A court adjudication confers on the named father the rights and obligations of paternity and is the basis for establishing a child support order.
Responses by Dawn M. Boyd, Attorney At Law, to inquiries on this site are based on the information provided and are for general information only. Any responses and information presented should not be construed to be formal legal advice nor establish the formation of a lawyer/client relationship.