question about lead pair

so are shrenu and zain the lead pair in this show? but then why is she his sis-in-law? havent seen the show yet but wanted to get this confusion out of the way? thank you.  

Earlier it was decided for zain and tanvi and shrenu was married to zain's brother (but it was a fake marriage later revealed) but then star plus came in between and told deepti the producer to go for a revamp as the trps were low as per them🤔

So then they decided to chuck off tanvi and then now I think they are making shrezain a pair as their jodi is already shipped by many even before the show had started 😊 But who is the end game no one is sure.. Anything can happen 🤣

The leads are Shrenu and Zain.

But no one, none of us watching the show for 2.5 months are sure about the pairing. 

https://wikiwiki.in/tv-shows/ek-bhram-sarvagun-sampanna/

https://en.m.wikipedia.org/wiki/Ek_Bhram...Sarvagun_Sampanna

EBSS is one such unique show where leads are not sure whether they are paired or not (still trending)

The main villian is dead still tashan is  Going on over his wealth (fake death)

The guilty are not shown guilty (sr mittals) and successful are not happy totally (sharmas)

Still show is slot king in trps and in top15 online and is trending top 5

Even the leads are not sure whether they are a pair or not . 😭