Mom Away on "Business" Couldn't Take Care of Baby - So Her Elder Sister Brings Her to Class

Anyone who is a firstborn knows it comes with a lot of added responsibility. The line between parents and the eldest can be a bit fuzzy, with the oldest sibling often having to take on more than their lion's share of looking after their younger siblings.

For one 10-year-old in Thailand, she took the responsibility of big sis to a whole other level.

Instead of missing out on school to babysit her younger sibling while her mom had "business," she decided to pull double duty, bringing the one-year-old with her.

She just became a viral internet sensation.