Help to find an ipkknd ff

Hello im looking for an ff of arshi

The story tells flashback too

It starts like arnav is married to another woman due to family pressure. In flashback khushi and arnav are happily married and khushi gets pregnant but separates due to sone misunderstandings later she dies by fire or something. It is later revealed that khushi is not dead and have lost memory. Has a son named aryan who’s premature. Arnav’s present wife saw her and inform him. 

Nani and khushi’s parents are hiding about khushi and aryan from arnav. 
  
Does anyone know the story?

Pls help