Last Saturday, Aundrea Smith shared a photo of her 8-year-old son Derek hugging his 5-year-old sister Charlee, who had just graduated from pre-kindergarten. As the two siblings embrace ... Charlee ...

After the ceremony, my son walked up to her and gave her a hug." "I'm just so proud of you," the boy said to his sister. The little girl, dressed in her blue cap and gown, starts crying ...