JokesMarriage A Mother Is Concerned And Decides To Take A DNA Test. This Will Blow Your Mind. A mother is concerned and decides to take a DNA test. She discovers that their child is not biologically related to her or her husband. Wife: “Darling, we need to talk. I did a DNA test and it turns out Roger isn’t our biological child.” Husband: “Oh, that’s not a surprise. Don’t you remember? When we were leaving the hospital, the baby had a huge diaper blowout and you said, ‘Go change the baby while I wait here.’” See more Previous joke A Stingy Old Lawyer Diagnosed With A Terminal Illness. Next joke Little Johnny Asks His Father.