Robbing a gas station is not the same as stopping in to buy gas. There's no equivalent difference between the actions of the three men in the other case.

The significant persion is the child, not any of the adults involved. At this stage the mother is the person who has to stand in for the child. Perhaps she picks out what seems like the best father for the child, perhaps she insists on DNA test to identify the biological father. I think that should be her decision.

People have to live with the consequences of their actions and their inactions.