Originally posted by: SONIA441
There were many theories abound.
But I think the main one was pretty simple - like Pallavi said that in the Episode itself - that this mark is still left, it didn't wash itself away.
It was probably to signify that Raghav will paint her in his colours & her white widowed life will soon be gone. This small mark was just a start.
The OST of the serial also has the line - Apne hi Rang mein rang de, Woh Saajan kahan hai - which literally translates to -
That one who will colour me in his own colours, where's that lover??
I hope I made some sense😆
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