Add a 4th angle to the story.
Add a past for Sai, who would have met Sai at a cultural event in another place, falls in love with her and proposes her and who is waiting for Sai's response though she declined his proposal. She accepts to be his friend and they become close friends.
The guy from her past is actually Virat's cousin whom Sai sees only after entering CN.
Virat gets to know that his cousin loves Sai and is still pursuing her after coming to know that Sai and Virat's marriage is a deal.
The guy continues to pester Sai. Sai is a good friend of him and cannot hurt him, tries to make him understand that she is married and at the same time ensure be doesn't do anything stupid due to the rejection. The friend starts to get into depression and Sai tries to help him.
This runs in parallel to the existing Sai Virat Pakhi story. This guy also supports Sai along with Aai and Mohit.
Virat is trying to understand what is happening and why is that guy still loving his wife.
Virat starts getting worked up that Sai is giving his cousin unwanted attention (as per him).
Sai cares for this guy since he is her friend and just like how she cares for Aai or Mohit.
Virat misunderstands their past and thinks that may be Sai had a doubt if she loved that guy and that is why she never liked him and never wanted to marry Virat.
I would like to see parallels as how they both get rid of their lovers, how one's pain is felt by the other eventually, how they deal with their friends, face their mixed feelings, come out of their insecurity, realise what they mean to each other and and how they get united.