Very true they have a very small window...couple days....that's why you need to stay wrapped up. They know their days.
No lie I've had five...count em five friends whom all found out they were not the father. Only one of the five females had the balls to speak up and tell one of my friends the kid wasn't his....but this was after eight months, so it still messed him up.
I got one friend now ain't no was his boy is his, he's puerto rican, mom is white blonde, kid look like red head blake griffin lol...other kid looks just like both parents.....they divorcing now but he's finding out shit from the past....I think he knows the boy ain't his but doesn't want to test to find out.
Crazy shit, I got many stories on this subject...smh