NK character from my view...
Here are my points of view on NK character...
I accept NK character is like negative but not totally from my view...In initial days I also thought NK is master mind and sandhya is doing as per his orders but later it varies.
From initial episode NK doesn't like sharada and her alliance for his sons bcoz she is from Boondi and he wants his sons to get married in high class and to a modern girl and also already he has self sympathy that he doesn't get modern wife etc...
And from the sharada defamation even though Nk is involved in this matter its not totally NK fault also. When he sees the video of CM and Sharada first time in TV, he doesn't like them bcoz Sharada doesn't do any favor for his business but involving in Hospital matter and sandhya is the one who manipulated NK and she is the one who told NK to take sharada good image from dadaji's eyes and everyone by thus she changed the name of swati as sharada and she is the one who made tauji to call NK and inform him about loan matter of meghna. In function also sandhya is the one who bribed video man to take photos of CM and Sharada and finally informed NK. So Meghna instead of focusing on NK she should first kick Sandhya out from chauhan house so all the things will get to clear. In karan's matter also Nk like and care for karan but he doesn't know how to express it. As a father he wants his son should be better than him. As the spoiler says meghna will get clue about nk but she can't proceed without proof but I wish meghna soon should come to know about karan truth by then she will start to focus on sandhya.