The Bride: Bill, it's your baby.
Bill: Was my reaction really that surprising?
The Bride: Yes, it was. Could you do what you did? Of course you could. But, I never thought you would or could do that to me.
Bill: I'm really sorry, Kiddo. But you thought wrong.
Usually combined with a lack of understanding for ones true age and required maturity level. Resulting in the cutesy use of the word, 'kido or kiddo' to describe ones bastard offspring.
In truth it is weird, you need to grow up and act your age.