Sadie may be the best big sister ever.

She may have just realized that people grow old and eventually pass away, and at two or three years old, that's not something fun to think about. Sadie doesn't want her baby brother to grow up, and it's the cutest thing you will ever see.

She also, has a wish for herself -- she doesn't want to grow old to 100 and die. Prepare to have your heart warmed.