I don't know why,but I think the women that Arnav's dadi was talking about is either Khushi's biological mother or Garima. Also I feel that Arnav's dad might have been in love with Khushi' s mother. Or it must have been the typical past about the rift between two families based on heer and ranjha's love story. It's definitely either Arnav's dad and Khushi 's mom were in love with each other first or a couple from both the families were in love and Arnav's dad didn't accept their marriage and shot them, but Arnav 'smom came in between them. Maybe it can be the other way round too; that Khushi's dad was in love with Arnav's mom from the beginning. But when Arnav's dad found out, he tried to shoot Khushi's dad but, Arnav's mom came in between and got shot. Than while Arnav's dad followed to catch Khushi's dad, Khushi's parents got into an accident. All in all, I think that either both their (Arshi) fathers were enemies or best friends, with their mothers been best friends. Overall I think it that the past would be either a Romeo and Juliet or Heer and Ranjha (because it was already foreshadowed in the charity event where Arnav was Ranjha and Khushi was Heer in the play)
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