After reading many comments in this post, I have come to the conclusion that the best way to go about this issue is taking the test and not talking about it.

Think about it, how many women do you know that say they are alright with their husbands asking for a paternity test? In my experience majority would have a problem with it and take it as a personal attack. Thanks to them, cheaters also act like it is offensive and make the man hesitant about taking the test and verifying if the kid is theirs.

Trust but verify. I am sure many men who raised another mans and a cheaters child also blindly trusted.

“Most paternity test labs report that about 1/3 of their paternity tests have a 'negative' result. Of all the possible fathers who take a paternity test, about 32% are not the biological father.“

So the best way to avoid drama and not make the mistake of taking legal responsibility of someone elses kid (18 years of payment if you are lucky, worst case raising them for decades just for the mother to confess that everything has been under a lie and they are not yours) is finding a way to take the test before signing anything in the hospital.