For the first, Vrinda is normally very careful, but DK managed to hit her on the head and smuggle her to the clinic, where she ratted out everything? And then, she managed to find the doc who had done this, and bribe him to give her DK's test? How did she know the place, if she was unconscious when she was taken there & back? It's not like she was conscious after it was over, and got the chance to meet Dr Anmol.
The next part of this - if Vrinda can get her hands on both the CDs - both her own as well as DKs, it helps clear a lot regarding her father's murder. If she is shown unconsciously knowing that the Jagirdars killed him, that's a pretty solid piece of evidence, especially when coupled w/ DK's confession. I think she may already have sent it, while telling DK that she's just planning to. For someone like DK who lies & cheats routinely, and Sandhya has to know that he'll have to kill her once the wedding is over, it's probably fair of Sandhya to have pulled this trick. Incidentally, the entire Jagirdar clan, including Sunita, but excluding the outgoing Jyoti & Priya, are her enemies. Sunita's attitude is inexplicable - she knew what Sandhya was up to when she came, and supported her in her mission, and now she's pissed that Sandhya is blackmailing her beloved pati and trying to seize the property. Sandhya should do what DK did in the beginning, and hold her responsible as well, since had Sunita not gone there to warn them, Shyamrao would still be alive.
As for her options, since she has to guess that the Jagirdars will want to eliminate her, she can do a few things. First is send both those CDs (as well as all photos of the Savratkars & Neeraj to Bhosle) to the police both in Gwalior & Mumbai (making sure there is nothing to show Yuvraj), and second is on the day of the wedding, or even b4, show up there w/ a baby (preferably one that she knows is suffering from a disease that will kill it soon, thereby depriving the Jagirdars of a waris, and only 'proving' Yuvraj's sexuality). If she does that, it's impossible for the Jagirdars to claim that she died of childbirth, since she'd have a full court press covering this wedding to witness that she had a healthy childbirth. So once she's put them in the spot, she can then order DK to get Prabhavati & Pankaj under the narcotest, and also, create a fake CD showing Prabhavati, Pankaj & maybe Sarla & Sunita plotting against Yuvraj, and play it back to him. Show Yuvraj wreck havoc on them all, and create a full blown civil war of Yuvraj vs the rest.
Speaking of Jyoti & Priya, as usual, the only solution for girls is to marry them off. In this case, one of the girls would have done well to stay, since after the Jagirdars are behind bars, someone has to inherit all this, and neither Sandhya nor Neeraj should accept it. Anyway, looks to me like they're either ending Jyoti's & Priya's roles by marrying them off, and removing the source of resentment that Sarla has. I have mixed opinions about this.
While it's true that Jyoti & Priya are innocent, question also arises that since the Jagirdars will soon be busted, is it fair to the Mittals (please don't tell me it's Lakshmi Mittal đ) to be matrimonially associated w/ them? It's just a tad better than Sandhya being tricked into marrying a eunuch. I half wish one of 2 things - that either all this gets exposed to the Mittals and they call off the weddings, or that one or both of the sisters hubbys turns out to be a eunuch, like Yuvraj. I'd love to see the look on Prabha's & DK's faces when that happens. Or the Mittals discovering all this, and hanging Pankaj on the wedding day b4 the wedding happens. In short, I want this wedding to be as eventful as Sandhya's was.
One last observation: Sandhya & Yuvraj demand that the property be transferred in her name, and the Mittals don't find it self-centered, and instead back up their demands? I thought that was weird!