Shabnam's motive

I haven't kept up with JR very regularly of late. Can someone fill me in with Shabnam's character?

So far I get that she claims that she and Ayesha are Shiv's daughters from his time away from the Patels - is that even true?

She also appears to be in cahoots with Gaffaur - that part was clear.

What I'm not clear on or not sure if this has been shown to viewers is - what exactly is Shabnam's motive?

I get that she and Gaffaur joined hands to ruin DD and Roshni. Shabnam is pretty creepy and clearly has a fascination for Sid.

In one of the last episodes she was rooting to have Sid thrown out and then throw the Patels out? So her motive isn't getting SId but throwing the Patels out and taking over all their wealth?

I'm totally confused and frankly I can't stand how Sid and Roshni never seem to catch a break - one issue solves the next starts - they got rid of Misha and the very next day they find Ayesha in their trunk.

At this point I'm certain that Ayesha has been planted it wasn't a coincidence that she hid in Sid's car when she did.

Any clarification - thoughts would be much appreciated!

But her motive is to ruin Patels, esp DD and Roshni.. i don't think she loves Sid.. She just wanted to separate SidNi, because Roshni's happiness is with Sid. For that she is trying different tactics like seducing Sid and throwing him out.. Ruining Patels may also involve taking away their wealth. Now how is she going to do that, we are not sure, we need to wait and watch. Everything she does is to take revenge on DD & Roshni, so that is her motive.. But we are not sure whether her back story is completely true😕