Wow... you are taking such responsibilities at your will, because you are thoughtful, and for the love of your family and not because it's your responsibility. Any thoughtful child will do so but it becomes wrong when parents make it look like it's the responsibility of the first child to cater for the other siblings because of he has been nurtured up to adulthood. However there's nothing wrong in children assisting their parents any time including in their old age
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