You have questions on about every topic that can arise in a family law case. The answers are complex. You will owe child support after she makes a request with the court. Those payments will not take priority over the obligation to provide for the child.
Spousal support is another issue.
The question is if the 2 of you want to air the specifics of your scheme in an open courtroom. Perhaps the two of you can simply agree that you were both aware that you were married to another and the marriage was bigamous and void.