People are dying over this kid's emotional reaction to learning his sister is his half-sister

Pam has a little brother, who recently learned that he is actually her half-brother.

Pam's brother doesn't quite grasp the concept of half -siblings.

So, when she came home recently she found this letter he'd written.

Pam, being a human with a soul, was deeply moved and tweeted out a photo of her brother's letter.