I like the ending you suggested, its plausible however i have no woes with Nandini actually falling for Kunal (not just infactutaion). I believe love can happen more than once, however may that love be out of respect, care and friendship.
Personally i agree, Kunal and Mauli seem perfect in their own world and people already (even after seeing poor Nandini's condition) hate her, why cant she fall in love? But that don't nessaryly mean she'll be running off with her BFF's husband.
But why Kunal falls for Nandini is what i want to know, she makes sense after coming out of such a horrible marriage but him? Why?
Thank you Y12