its a 7 days wait. In the beginning of the episode, Razia says that 6 more days for Zoya in this house. it was the day of haldi. Now suddenly after haldi function, humaira says that tomorrow is nikhat's marriage and Zoya will go tomorrow, but they cant alter whatever happens in this 7 days. wow...6 days pass like this only. I think cvs need to take care of such thing rather than making this accidental marriage and all, which is completely illogical. By the way which time machine they are using. so that we can also use it and FF and reach when they are planning to unite ASYA. But on a serious note, they brought back Tanvir, and she is not doing anything in this 7 days, and when cvs are planning to bring the issue of invalid marriage. If we have noticed this loophole then certainly they too have leave it purposely, and that is the reason they made Humaira say that Zoya will always be ayan's first wife.