After 3 years, a wife starts to think that their child doesn’t look like any of them, so she decides to have a DNA test done.
She gets the results back and finds out that the child is actually from completely different parents.
She tells her husband, “Honey, I have something very serious to tell you.”
“What’s wrong,” he asks?
“Well according to these DNA test results, Peter is not our child.”
“Well sure,” he said. “Don’t you remember? When we were leaving the hospital, we noticed that our baby had a wet diaper and you told me to go change the baby.”