I know a couple that got married and had one kid together, and then the wife got pregnant with another man, and so the couple split up, I don't know if they got divorced, but the separated
and now they're getting back together again, so the guy is going to father a the child who he is not the biological father to in the family..
I'm not sure how that's going to work, that's their business though, I guess..
According to the book The Selfish Gene, though, (I think it was) 10% of babies in the world are born to a father who is not the real biological father.
I can see genetic resemblance in both my parents though..
I think parenting should be treated as a serious life-long commitment, more serious than marriage itself, I'd think.