More information is needed before answering your questions. You mention her husband, which could be a defense because husbands are considered to be the legal father to all children born during the marriage, but that presumption is rebuttable.
These are complex issues, and it is important that they be handled correctly. Therefore, it is important that you consult an experienced family law attorney to find out what options are available to you based on the facts of your particular case.
If you need more information, you can visit my family law blog (www.SCFamilyLaw.com) or our website (www.SpartanburgLawyers.com). I wish you the best of luck.
Ben Stevens