This woman was my girlfriend for about a year and a half. We had no plans on living together, she was to keep her apartment and me mine. Without my knowledge, she thought she could get over on the system by claiming to social services that she didn't know who the father was, in order to receive benefits (which didn't work out for her). So when I wasn't at the hospital, she filled out the birth certificate giving my new son HER last name. Once I found out about it, I told her I wanted it changed, asked her to see about making it happen, and for the past several weeks she's been leading me on telling me she's working on it. Today however, she finally comes out with it and tells me she's not changing it, she wants his name to stay the same. Is there anything I can do about this? I want my son to have my last name, he would be the only child with my name, and my only chance to carry my name to the next generation. Without it, my last name will die off forever.