Really every action has equal and opposite reaction in our life also. Roshni and Arjun broke riya's heart and they got their reaction too. But the end of roshni was a little bit more barbarous but it's karma. Everyone has to suffer for their deeds may be after years or decades. Getting one's love is not a sin but infidelity and extra marital affair can't be justified by any way. I really like this story very much.
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