They put the non-biological father on the birth certificate ALL THE TIME. The law doesn’t care about DNA, they care about the law. The husband of a woman who gives birth is legally the father - even if he isn’t the biological father. Kind of a messed up situation for some - their wife cheats on them - gets pregnant - and they are legally responsible for support of the resulting child.
Fun fun fun!
Well, yeah, and there was the recent case of the sperm donor guy who got sued for child support after the two “parent” queers split up. This is all “bedrock “of course.
It's at least plausible that another man could be the father. But there is absolutely no way that this combination is possible.
Just another example of the re-definition of marriage also redefining parenthood and a multitude of other realities.