Watch: 5-year-old devastated after finding out her little brother has to grow up

Growing up can be rough, but for 5-year-old Sadie it is even more difficult when she realizes her little brother will not be a baby forever.

Sadie was devastated when she learned her baby brother has to grow up.

“Oh, you are so cute! I love your cute little smiles. Oh my gosh! I want him to stay little!” she said through tears.

The baby responds in the most adorable way he can, with a smile.