It is not some lonely existence either. They have a family comprising of 5 people headed by their father. Now that Mona and Sri are both gone, the problems of the past and all the hatred between the kids can be put to rest also. They all share the same blood after all.
People who were in even worse conditions like SRK who had lost both parents and had a mentally ill sister that required being taken care of, was still able to make a career. People adapt to their circumstances. Humans have great resilience.
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