I have dark take on the climax
In the end both twins will suicide.
Younger brother because of the guilt complex of what he did with the girl
Elder brother because of the guilt feeling letting the events happen starting from ignoring his wife which may have resulted in infedility and also of the guilt that the girl will see him as reflection of his molester.
Indication was there.
There was a mention in movie that Pramod did not file a missing complaint after his wife left as he suspected something
It was his brother(womanizer) who filed Missing complaints and pursued them to Mumbai along with his police friends.