There are a few more questions that would need answered before I could give you a definitive answer about how to proceed. For example, do you know who the biological father is? Is he aware that he is the father? Is the biological father available? How did you confirm paternity if you did not have a blood or DNA test? Did the man sign a paternity affidavit or were you married to him when the child was born? You should really sit down with an attorney and discuss the available options.