Sister loves Baby Brother too much to let him Grow up

Little Sadie, 5, is grappling with the big questions at an early age. In this YouTube video, she heart-breakingly tells her family she doesn't want her little brother to grow up.

"He's so cute!" she sobs, giving him a hug. (And she's right.)

She's also thinking about just how short life is for all of us, big sisters included. "And I don't want to die when I'm a hundred!" she sobs. 

Fortunately, little brother's cuteness just about saves the day, as he gives her a little smile and she can't help but give him one right back.