So there is a famous claim about a couple where the woman gave birth to one black looking child & one white looking child
I just realized each of the children could have had the same mother but two different fathers
But tricked the father into thinking he is the father of both
Or maybe there were even three or more men & that guy is the father of neither and two different men are the actual fathers of both of them
A woman with twins can be pregnant by 2 different men
