Every child reacts differently to the news of becoming a big brother or sister, but little Kathryn's this reaction will keep this family reeling with laughter for quit a while.

The best part of this whole video is the dad's reaction, he is genuinely laughing so hard, and is trying to get it together but he can't. I laughed just as hard, yes I guess I am still 12 years old at heart.

 

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