Sushma,
I’m really sorry for your loss, and for the difficulties ahead for his wife and children. It is very natural to have lots of questions come up, as the pain of loss makes us question our faith in the goodness of divine love. Its OK to set the questions aside for now and let yourself grieve.
However, perhaps Sushma is part of answering those prayers. You prayed for help for the wife and kids, and perhaps you will receive some inspiration to help them in whatever way seems right for you. If it comes, follow it, help them, be the light. Remember that God works through us, not for us.
With warmth and condolences,
Matt