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The Best Big Brother Reaction Ever

Telling a child that they're going to be a big brother or sister can be one fraught with anxiety for the parents. Will they be excited? Jealous? Confused? Luckily for Sarah Bromby and her husband, their son pretty much had the best reaction ever.

After showing an ultrasound picture to 5-year-old Ethan, his mom tells him, "Guess what? You're going to be a big brother!" The giant grin that erupts on his adorable face is just priceless.

"Is that your baby?"

"Is it in your belly?"

A string of questions follows his reaction, including our favorite line: "Is that why you're breathing so much?"

RELATED: 15 Hilarious Pregnancy Announcements

Watch the infectious joy for yourself:

Ethan even graciously announces that his new sibling can sleep in his bed. Awww. We're sure he'll be an amazing big brother.

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