My n-laws 70plus working hard from the age of 7 by doing farming às he has no father. Now at this age of 70+ also working hard along with Maintaining our sasuma who is suffering with algemers.

Why they are working so hard still at this age inspite of having elder son who has almost net worth more than 300crs.

My husband has no proper income. Even if I want to help in-laws they come and stay for 2 days and leave. If we have to go and stay there house is not sufficient for all . For construction we are not able to afford .
my brotherin law is just skipping the situation and moves back to US.

Pls help why the situation is so bad.Is it yaksh gandarva curse? I don’t have any birth details for my in-laws.