Neha was under the impression that Prateik was hooked to her 'addictive personality' and would pine for her like a devdas. She just couldn't digest the fact that he was over with her in a matter of days and moved on so quickly. That's where her issue of him having a set pattern stems from.
She specifically said Nishant did not went around finding another Moose and Shams never searched for another Raka...then how could you?
I was like wtf? You are married..what are you expecting.