Men's Group

the moral aspect is different
and honestly the guy may say "fukit" and stay as the only father the kid's only known.
it doesn't change the fact his wife (soon to be ex?) cheated on him in a very serious way.
Also, I say that because if a divorce happens, and he WILL loose custody of the child, just how the system works 99% of the time, he should NOT be financially responsible IN ANY WAY INCLUDING ALIMONY!

after my divorce I found out my ex was sleeping with men unprotected while we were trying to get pregnant. so I could have been on the hook for a kid that wasn't mine (one of them was black so it would have been kind of obvious).

so yes, I would have fought tooth and nail because damned if i'm going to be responsible for someone else's kid. but still... if things had worked out differently, it would have been my kid and I would have stayed around and raised it.

at the end of a day, your children aren't blood as much as the people you raise and mold.