There is one saying that"Every emotion in limit is good but when emotions are more than required then it is bad". RK is caring for Madhu more than required so I am definitely smelling fishy.
But i will also not rule out the fact that MEIEJ is love story so even if RK is taking revenge right now then even he will fall in love with Madhu.
P.S.- This is the only thing that has been running in my mind since i read the confession news.
I don't hate the character of RK this is merely my observation or you can say kind of prediction.