even i have wondered if Humeira is really Razia's daughter or not. Also, i have a feeling that Razia herself has 'gandaa khoon' because she accuses everyone else of that. And Tanu has some type of relationship with Razia ( both belong to the bazaar?)
If you remember the initial episodes (may be 1 or 2), Razia talks about how rich her family was and how strict her grandfather or someone was and all that self boasting. If that is true and she is from an affluent family, how can she belong to a bazaar? Yes, Tanveer did say she was from the same place, but if that is true, the initial episode's dialogue was a blooper? Remember she also says her bhaijaan sent the carpet from some place.
Somehow Razia being from bazaar doesn't make sense gafur's family was very strict and they found him the alliance of Razia, so would they bring someone giri huyi for their son? Or could it be that Tanveer knows about Razia's pre marriage affair or maybe even a child out of that relation? Sometimes it is good to leave logic out to enjoy the show. Don't you agree?