This is what I think happens:
The wedding scene shown today was Robbie's imagination--after which he runs to Kasturi's place to see her
When Kasturi's mom comes to get her--its for the wedding and not bidai
Should Kasturi forgive Robbie so easily?
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Of course it would be an interesting turn of events if the wedding did take place...or like KZK they make Kasturi's sister marry Raunak....