Sultan ko kussa kyon aa raha hai ?

Why sultan is getting angry ?

Because of RK is manhandling Madhu in front of all or he is
getting jealous of them 😉

And how long RK will treat madhu like this.She is from lower middle
class and she doesn't have money or power to stand against him
so he is pulling and pushing her to his wish so far.

May be Sultan will get obsessed with Madhu and will turn into evil man .
This my guess.
So far he is not acting like antagonist.