After watching today's episode one thing is clear than KT has become very insecure as a person since Nandini left him. Today also when Preeti was packing his bag he thought she's leaving him, that's a sign of insecurity cos this scene has happened multiple times ever since they're married.
Also KT is emotionally dependent on Preeti. She's become his support system for now. And that's why he doesn't want her to leave him. If he really loves Nandini, its best for them to unite and I think Preeti's decision to give them a chance is right. Cos she stands nowhere in this relationship.
And only when KT-Nandini unite and Preeti leaves, will KT realise the difference between the 2 women and his feelings towards both. He'll realise what he has for Preeti is actually love and respect and for Nandini its just his madness and unfulfilled revenge.
I'm ok if the track proceeds like this