From Fri and today's episode, we know that Thakral wants to use Raveena against Kunal.
Rohit himself is not convinced about Raveena helping. He probably brought her to meet Ritcha just to get back in her good books and her love but not really for Kunal's case.
Thakral wants to know Kunal's next steps, what he is thinking , where is he going for next clue etc.
Would Raveena be doing the right thing by supporting Kunal in false case? Or against him like she did last time?
Both are possible and here is why
If she decides to go against and strong possibility:
She still is angry on Kunal especially since he told her she is dead for him. He forcefully made her to marry Viks against her wishes. Based on last 2 epi, looks like she still has not forgotten Rohit and can be easily influenced again to Kunal's disadvantage.
With that in mind, what Raveena can steal is probably the case arguments or file, Kunal is working on for his defence [ either make a copy or Kunal finds out on the day that he cannot find it and blames on poor Siddhi again like last court case about CD ]. This way Thakral will know what Kunal's next move is and plan accordingly. Other than that, in this case, it is Richa's words against Kunal's. There is no physical evidence other than thakral managing to influence waiters at the hotel in falsifying some BS.
She can do this only when she visits Chopra house on some pretext. Would be difficult for her to figure out each and every move of Kunal unless she moves into Chopra house or plays drama and is with Kunal all the time [ both are not possible. Plus she has being shown as dumb]
If she decides to support Kunal [ less possible but still chance]
This can only happen if Viks intervenes [ she has no brains, unless Cvs magically show her as having one😉]. For Viks to brainwash Raveena, she first has to say something to him. If she goes alone like this to meet Rohit, he would not find out. Unless he is shown following her to see what she is upto and confronts both Raveena and Rohit together.