I just re-read the chapters quickly and realized how suspicious the cousin is. He is a sleuth and can see without his glasses - even though he says he can only see shapes and colors... something is up with him because him looking in the bag is not the first or last time he's acted unpredictably
Guys dont worry about baby!!!
He probably got his mother's artistic talent like how his brother got his translation talent from his father (≧∀≦)