The focuses in the image are the family sitting and having a chat. The family take up most of the picture so they must be the focuses.
The setting is a crowded slum and the family is chatting happily there, there are also two girls sleeping behind them, they may be part of the family. I think the story behind this image, is that the children have nothing to do as they are poor and have nothing to play with, so, they chat together. The father is not in the picture, he may be out to work. The message the photographer may be conveying is that although the family is poor, the children are still very happy and we should appreciate what we have and not complain about what we do not have. I like the way the photographer photographed the family in a very natural way. If I were the photographer, I would take the photo further away as I want the people to see the conditions the family is living in.