Birth giver

snuck and sneaked are both technically correct

"Like leaked as the past tense of leak, sneaked was the original past tense and past participle for sneak, which means “to move in a stealthy or furtive manner.” Used as early as the late 1800s, snuck has become the standard variant past tense and past participle of the verb sneak." http://blog.dictionary.com/snuck-or-sneaked/

The better question is why did she then send it to her daughter?

My point exactly

Probably just to show her what she saw. And how funny it was.

Calm down. They were just excited and typing fast.

sneaked and snuck are both correct. Sneaked is actually the real word and snuck has just gained acceptance