Mishri's fault

To give her the credit, even though Mishri broke down with her brother's possible plight, she did not thought of using someone else to replace Dharmi.

But once the idea was planted in her mind by Dharmi's mother, she could not resist it.

The sad part in this whole drama was the only sane people involved in this whole situation were Aru and Mukhi. And Mukhi seems to be unaware of the decision and Aru was first pressurized and then made to believe he consented (It must have meant a lot for her as she DOES respect his opinion and for a right reason)

Mishri's real fault does not lie in trying to protect her brother's reputation or (so called) future happiness. Her real fault lies in choosing a life for someone of her age which she would not have chosen for herself.

A girl who is getting married to someone of her own age, educated and is planning to go abroad, did not think before taking such choices away from another girl who is also of the same age.