You are the daughter of Negan Smith. You were born after the apocalypse started and live at Sanctuary with your father. So, the father you knew growing up was the cold hearted monster that he became, however, when it was just the two of you he was sweet and kind and you are the most important thing in the world to him. Years later, after him and Rick Grimes broker a fragile truce you start feeling funny one day and decide to take a pregnancy test. It comes out positive and the only person you have been with is Rick's son Carl Grimes. It happened at a party where moonshine was involved. The test gets found in the trash at Alexandria and everyone freaks out trying to figure out who it belongs to.