1.) Why did Tanveer feel nauseated at the smell of the fish on that day
2.) Why she didn't want the Doctor to do her check up
3.) Why she had changed those blood samples
If Zoya's mind rushes in this direction she would definitely be able to fathom that Tanveer had been pregnant since long before and THIS particularly was the reason why she wanted to marry Asadin addition to all other reasons she had herself revealed to her (looking at it from. Zoya's pov since she's not aware of Razia-Tanveer alliance and hence Tanveer's ulterior motive to avenge Razia)
Even if she does not reach this conclusion(the possiblity of which is minimal) she should atleast reveal to Asad, Dilshad an Nazma about what Tanveer had warned her of before the wedding, how she had twice attempted to kill her in Ajmer!
It would be a blunder of all blunders if Asad STILL DOES NOT believe her and trust that scum bag(pardon my language)
God Forbids if the CVs have still no plans of ending Tanveer's chapter, they'll show Zoya yet again keeping all the truth of Tanveer's misdeeds to herself and Asad falling prey to her rediculous pregnancy drama!