I don’t know why some enterprising lawyer doesn’t file against the real father in these situations.
I.E. You get married, your wife has an affair and gets pregnant by the other guy. Has the while in the process of divorce. You get nailed for child support even though it isn’t yours. Why can’t your laywer get a dna sample from the father, prove it is his not yours, then file on your behalf to sue the real father for the support.
In a sane world, that's what would happen. Unfortunately, legal father status might have more to do with whose name is on the birth certificate.
Also, once I watched a news program on the following story: A man's wife cheated and bore the other man's child. The man divorced his wife. Unfortunately, as per his state's laws, the husband of a woman who gives birth is legally that child's father. So, he ended up on the hook for child support.
Carnell Alexander. Although he didn't have to sue the bio father, he did have to take his case to the Feds to beat the State of Michigan.