Sanjana has an explanation for her broken relationship with her brother. She has dragged Raman into the mess by calling him her so called once upon a time boyfriend.
Let's introspect.
There can only be 2 situations:
Raman met Sanjana before he married Shagun
Sanjana was a rebound for Raman after he was dumped by shagun.
I don't think the second option could have happened. Coming to the first one wherein Sanjana also added that Raman dumped her. Really? Someone who valued love, emotions, feelings, care, relationship could dump a girl? And on top of that her brother would happily shake hands with his sister's boyfriend who happened to have dumped her. Give me a break.
Where is the story heading? What kind of strange twist is this?