Legal Question in Family Law in California

You will pay support, unless she makes more than you and/or you get custody of the child (extremely unlikely until he is older). You don't get to avoid the obligation to support your child just because his mother behaves badly. Once the child is born, either you and the mother can sign a declaration of paternity, or you have to file a lawsuit to establish paternity if she won't cooperate. Then one of you must move for an order for custody and to establish support. That's how it is done. How to present your case is not something we can help you with. You'll need your own attorney for that.