I agree that the evil trio need to be punished.
But I would not wish Rape on my worst enemy. It just so happens that Shaurya's sister Kangana is going out with one of the Rapist that Raped Payal.
Justice would be if Kangana finds out through him that her brother had a big hand in Raping Payal along with his friends as a bet.
Then I would hope Kangana would question her brother and her parents as to how Shaurya got away with such a heinous crime.
I would be very interested in knowing how they would handle that and still keep Kangana from realizing how evil her family really is.