Every character has limitation and goodness. If we look at all the characters, all have come back to what they were originally. Hemlata blaming, Pratap again back to his normal self, Chanchal plotting, Vandana trying to relieve burden and make room for all, Siddharth quiet, Viren insecure and Nivedita obsessed. Circumstances have changed, but the characters are still same. It has nothing to do what is right and what is wrong.
Viren had always a feeling of insecurity, its like something ingrained in him. His reactions to insecurity had been very severe, as was revealed before. His insecurity led him to illusions and had been most vulnerable. It seems he is not yet out of the insecurity, and this is not at all bad. Every person is sensitive to something and no one can be perfect.
Nivedita is a brilliant character, but there was always a flaw in her character. She always was obsessed with Divya- Hemlata and now she is obsessed with Divya's daughter. Though unwillingly, in her obsession for Divya, she caused pain to her own father, grandmother before. And now she is causing the same to Viren. Its not her intentional deed, but somehow, she gets affected by Divya and Hemlata the most and ends up ignoring the people who care for her more than Divya and Hemlata. When the entire world including Viren is trying to make her understand that she is not responsible for Divya's death, she is only paying heed to Hemlata's words. She should concentrate on the child, not because she believes she is responsible for Divya's death, but because she has to bring up a motherless child, so that the child does not feel mother's absence.
This is a test for both Nivedita and Viren. After Nivedita and Siddharth got marrried to Viren or Divya, both Nivedita and Siddharth never ever did anything that their relationship can be questioned. Both have been extremely dignified in their dealings towards each other.
There is not 1% scope for Nivedita and Siddharth, except under one condition. Is Viren really changed for good? Is Viren still vulnerable to do something that he did out of insecurity in the past?
Plus, who is the person involved with Bhaiyaji in the blast, if anyone is at all is involved?