Since Shabby is positive, we can assume she is not involved with Yash. The major loophole in the earlier track is sudden disappearance of Ayesha mother when Sid went to search for her.. The dead body was not shown, even Shabby was in Dubai, she just had got info of her mothers death, when she returned and decided to take revenge.. that is what Gafoor said.
So, the entire plot of Shabby revenge is her mothers death. What if Yash is behind creating situation like Shabby mother is dead whereas she may be held hostage somewhere or is ill or lost memory but is alive😛 I hope by the end of the track their mom come and go away with her daughters. Shabby can remain positive and Patels can give them money or some property.. and all can be out of the show for good. What say?😛