I may be mistaken, but I have a doubt that someone other than Jasmine was the sender of the letter Mallika received (Jasmine wants Malika - Nikhil and Advait - Naaz, she even got the similar lehenga. So why would she send Mallika away? If it's for the brideswap, Mallika should reach the mandap before wedding)
However, if this is Naaz's plan then why did she waste time on taking pictures?
hmm you've got a point!! jasmine's plan focuses on bride swap hence the same lehenga for both brides
even now if jasmine's plan executes somehow then nehmat should get married to Nikhil and not advait so I am pondering how will nehmat end up with Advait
There is a possibility that it is indeed Advait's plan to get married to Nehmat and I hope if thats the case we will atleast get to see how and when he planned it and why he did that 🤔
P.S. if it is someone else then who could it be 
remember in today's episode the letter's voiceover was of some lady so my doubt goes to jasmine
CID
