I think it should be Akshara herself..
And since it has already spoiled most part of the wedding i think it should be properly showed..not just all of a sudden change in naitik's behaviour by some lecture of mohit or RR..
He should tell Akshara why he behaved the way he did..what he felt..
I mean we should get the answers to all these question by the horse's mouth.
They have to spend their life together and they should sort it themselves..