What would you do ? After 10 years, the wife starts to think their kid looks strange so she decides to do a DNA test.

She finds out that the kid is actually from completely different parents.

Wife: Honey, I have something very serious to tell you.

Husband: What’s up?

Wife: According to DNA test results, this is not our kid

Husband: Well you don’t remember, do you??
When we were leaving the hospital, we noticed that our baby had pissed and spoiled his underwear.
Then you said:

• "Please go change the baby, I’ll wait for you here."
  So I went inside, got a clean one and left the dirty one there.

*Moral Never give a man a job that doesn't belong to him.