Paternity manenos

I’ve seen a story in FB ati a certain man did paternity test and out of 4 kids only one is his. So is this a way of punishing the man or how really is this possible? One could be an accident as we know how generous married women can be but 3 kids is alot unless it’s on purpose to punish the guy coz many married ladies are bitter with their husbands. Hii dunia kweli iko na mambo. This Daddy Owen’s mambo itafichua Mengi.