When 5-year-old Sadie Miller realized her baby brother would one day grow up, she completely fell apart.
Sobs wrack Sadie's small frame as she contemplates aging, her own mortality and just how unbelievably cute her baby brother is.
At one point, Sadie wraps her arm around her little brother gently and says through sobs, "Oh, you're so cute. I love your cute little smiles."
He really is so cute. But Sadie, right now, you're the cutest.