As per my opinion, nothing to do with novel "Rain in November":..
Khushi who was Muskan in previous life and loved Aryan so much that she came back just for him should not marry again to any body now. Aryan should come back in this world just like Khushi came back. They should show about 20 years leap, Durga should marry to Doc, Aryan should meet both women once again, Aryan should figure out that Khushi's love was stronger than Durga as Durga did not wait for him in one life, other hand Muskan still waiting for him, they should show Muskan-Khushi and Aryan's reunion despite of their age difference. Durga is jealous about khushi having Aryan's child, while khushi accepted her as Aryan's wife and Aryan's child "Shradhdha" long time ago.