Joke Collection Website - Talk about mood - Does the younger brother have an obligation to take care of his younger sister?

Does the younger brother have an obligation to take care of his younger sister?

Yes

My younger brother was brought up by my sister. If he has the financial ability, he has the obligation to support his sister who lacks the ability to work and financial resources.

The obligation of support is the obligation of children to their parents, so the obligation of brothers to their sisters is the obligation of support.