You're right...K&V may have a backstory. Maybe there was a misunderstanding and this dushmani started?
Looking at Kabir's character now, he looks like a person jiske liye uska mission is everything. I mean, he sent a civilian to a dangerous mission as if koi badi baat nahi. Aur wo bhi khud ki girlfriend, jo ki he knows is kind of a nazuk kali types. Does he want Ridhhima to get caught?
On the other hand, Vansh is being shown as a ruthless guy outside but a nice guy inside? He seems like a guy who believes in love but at the same time, runs away from it.
Lastly, Riddhima. She's shown to be an orphan who craves for love to such an extent that she went alone on a dangerous mission. Not once did she question Kabir about anything.
So out of the three, it feels like Riddhima is the person who can do anything for love.
Now the question remains, whom will she love in the end? If she really gets married to Vansh, she may unearth his secrets. Will she be with him inspite of that? Will she become a stronger woman to save her love?
Or will she remain loyal to Kabir until the end?