Hello,
Is it possible that Vikram is sent by Tanu to get news from Siddhiki house in order to expose Razia soon. As she must have witnessed while passing by that rajani did not know who vikram shukla is and she was searching for him when she was asking that to priest ( temple scence). As of now, wh have seen that tanu can hear and see pretty much everything what other people say as she used to always hear asad/zoya/dilshaad/ even gaffer-razia conversations ( when gaffur was talking about zoya )from the phone.
I am surprised how come tanu is not doing anything to get revenge from razia. Because first it was razia who did sent the reports to khan villa and that is how zoya came to know about tanu's lie about having asad's child.
Rather than coming back to zoya/asad's life tanu should spent her time thinking about how to expose razia.