Pratigya was aware of Krishna's feelings on the day of engagement itself .....if she was not aware ..she would have known when he refused to come inside ...If she was sensible ..she shud have then and there taken the leave of her parents and driven off with her hubby ...but the CV's had to show her knowing the truth ...so they committed this blunder
Infact I think pratigya should have told him the news in the reverse order. i.e. the convo should be as follows:
P: I am not going to attend aarushi's wedding
K: why?
P: Because I will not go anywhere without you
K: Why will I not go to Aarushi's wedding?
P: Because you are not invited.
first she should tell krishna that she is not going to attend the wedding.