I guess this story line was strongly inspired from the life of Jennifer Winget and Karan Singh Grover when makers started watching her on Bepannah which is again based on extramarital affair.
But I can say it's the failure of Script. The story line is relatable in this modern society relationships, but they could've executed small details carefully and more realistic, reasonable and relatable because it needs a lot to establish such high level relationship with people like the relationship of Mauli and Kunal. Mauli is Kunal's 1st love (Hopefully) and the transition state could've been more sophisticated, gradual and reasonable. What you guys showed is even though Kunal and Mauli are a perfect couple, they don't get their quality personal time. And at such a point where Kunal is having no major issues in his relationship, it's projected that he gets mesmerized by the dance of Nandini and this feeling troubles Kunal a lot. Until then it's okay but when did this infactuation turned out as love? ?
Do you guys know what love exactly Love n loving someone is?? Cutting it., At this point (I call it transition state) where his feelings gets stronger day by day, you could've projected it gradually rather than all of a sudden., Coz my argument is with a relationship like Munal, it's pretty hard to fall for another girl unless there's a strong reason n necessity.
So for Nandini's part, she's shown as a dhokhebaz frnd which anyone would pray not to have. She don't has a personality and I don't understand what made Kunal to choose Nandini over Mauli. I don't understand this bus station scene where Kunal professes his feelings to Nandini and Nandini who actually wants to leave the city since she couldn't deal with the ongoing situations anymore for the sake of Mauli, in an instance, after Kunal's confession turns Selfish and accepts him. For a moment we'll think that she's not that strong enough to deal that situation and accepted Kunal at that moment, she could've realised it after that whenever Mauli visits her, she hides her relationship which is called betrayal.
They share an intimate time and after coming back to Mauli, when she says about their marriage scenes, and how deep she loves him, he could've revealed it to her.
And finally when Nandini is celebrating Karwa chauth, Kunal comes back to her saying that Mauli faked her pregnancy (which is not true) just to bring him back into her life, at least for a moment she could've thought about Mauli's Character and personality and the Love which dragged her to such a point where she went out of her values and personality to get Kunal back which shows her desperate love towards him., And then she could've simply said that even though Mauli has lied about her pregnancy, you should not be coming back to me coz it's not okay to play with Mauli's feelings and if you can't do that then just simply stay single but we should never be together.
I've given these many chances to the show in a hope that one day it would make things sensible but in vain.. So overall, I can say they could've worked better on the Script cozz the actors are doing a splendid job giving their 100%.