Junooni, do you still think Prachi can love anyone else other than Milsi? If she really loved Neev as much as he seems to love her, then how come she got over her love so quickly? She does'nt even show the slightlest bit of remorse for losing Neev.
Since you had made a comparison between KTH and KYM before, I am drawing a parallel here. Kashish started liking Piyush only after Sujal kept hounding the two of them and thrusting his love on her. So by way of retaliation she tried to get closer to Piyush and ended up accepting him as her husband in every sense of the word.
In this case Neev never thrust his love on her. Even in the cliff declaration, he inadvertantly admitted his love for Prachi because he thought her life was in danger and he will lose her forever. He always respected her married status and did not harbour any hopes of breaking their marriage to get her back. Yet Prachi went to Milsi not as a sense of retaliation but because she was genuinely drawn to him. What started of as duty in the initial days of her marriage quickly developed into deep love for her husband especially once she saw the beauty of his heart.
After her marriage to Milsi, Neev never entered her thoughts, not even once. Now that is a bit strange if you have truely loved a person, how can you forget that person so soon? This only shows that Prachi never really loved Neev as a lover but more as her childhood friend. She never knew the meaning of true love till she felt it for Milsi. Although she has spent relatively short time with Milsi than she did with Neev, he now seems to dominate her every thought and action. Even this foolish act of hers to protect Suki's raaz is out of that love since she thinks he will be broken if he comes to know the truth.
And this deep love of hers is not something that surfaced after they consummated their relationship. It was in evidence much before that when she left the house after Milsi first said he will grant her a divorce for her happiness. That night the way she howled in the rains was unforgettable and heartwrenching. It was as if somebody just stabbed a thousand knifes in her.
Even if they end up showing Milsi with Ayesha and Prachi with Neev again for whatever compulsions, these two will never be able to feel as much for their partners as they do for each other. MA and NP union will be frought with unhappiness for all four of them.