I think that after the whole truth is revealed then only Neil will come to his senses and realise his mistake in loosing faith on AVni and her love.
But in present scenario I don't know how it be possible. Avni for certain will not say a word. Whatever Avni says now Neil is taking it otherwise and repeating the same dialogue that don't you had faith in me. Avni had great faith in Neil. If you remember when Avni had gone to meet Vidyut she had told him that now my Neil will deal with you. But the circumstances during that time were not in her hands.
Vidyut reveal the actual fact how Neela was killed and the video clipping. He blackmail Avni to the extremities, either you marry me or let Your father in law go to jail under false charges i.e. killing your mother and I'm going to destroy Neil and your so called family.
Knowing the actual cause of Neela Maa's death and the truth that Vidyut actually wanted to kill Neil by his own father. She acknowldged that Vidyut can go to extent in obtaining her. She might lose all her beloved. She was not able to reveal the real truth behind Neela's death. Neil would have felt that because of him Neela Maa died and he is the reason of Avni's trauma of losing mother. Then Prakash would have felt guilty though unknowingly crime was committed by him when he was drug. He himself had told that it is very scarring if you know that you have done sth wrong to your near and dear though unknowingly. Like her dream he might had killed himself feeling ashamed. If NAvni, he must have lost his self control and would have taken law in his hands. Considering all these things, with AVni nothing was left but to stop this fight. But to stop it she had to die. SHe cannot include Neil in her plan because she need to tell him the truth first. She chose what was best for the well being of her family and her love. Apno ke liye khud ko mitana.
Step taken by her was not digested neither by Neil who does not know the real reason nor by the viewers. But actually there was no other way left either to continue the fight and lose everybody or destroy her own self and safeguard your near and dear. She had made sure that Vidyut is arrested so that her family lives in peace. Who ever dies is their fault. No. SHe died for the world for Neil her love. She told in the video which she send that Neil tumhe jab bhi meri yaad aayegi tum muskurana. SHe meant Neil to be happy and always remember the happy memories which they spent. She never knew that it will happen just the opposite because people die but zindagi chalti reheti hai.
She had not done such a big crime. Well to come back when will Neil realise his mistake of ill treating Avni and the real reason of Avni going away, I have mentioned Avni will not say a word. There is only two option left i.e. SUnheri or Balliu.
But it will be highly emotional and heart breaking when the real and the actual truth will be revealed. Neil now thinks that Avni had taken that step for Neela Maa but when he will come to know that Avni had done all this for him, he will be shattered.
Today one more angle came to my mind. Maybe officer Neil Khanna is still alive in him. And he is doing all this purposely. It can be a great shock for the viewers that in the end the twist will be that Neil had done all this to know the actual truth behind Avni's decision becasue he knew that Avni will not say the real reason. While reading Neilanjana's diary, he told himself that this person is carrying many things in her heart and I would like to help her to come out of her miseries like I helped Anaanya.
His anger when it was reveal that Avni is alive and Neilanjan is AVni , he must have felt betrayed and more over shocked. But his officer mind might be alert. He had recognised the plan of Mithali and so he might have done two and two and must have come to the conclusion there must be more. But to ask the real truth from Avni is of no use. By showing hatred , he may be is covering the investigation he is making. Or he might want AVni to say the real truth herself by behaving to her in this way . This is totally my thought that came to me , I just thought to share it. It can be possible. Because we are all not happy with the Neil Khanna portrayed now. To again make him the Neil Khanna which we admired, its possible that the creatives will honour us with this damaka and present us the Neil Khanna whom we admired.