It might not be very difficult to guess the reality - murder or subside. And Rizwanur paid the prise for his well planned duplicity. Actually that kafer married Priyanka mainly for wealth barring all the postulates of his parents "we wanted only our bride not money" and all those crap. Priyanka's family realized the true motives of Rizwanur and followed the right path. As a matter of fact I would have done the same.