After watching the whole episode I conclude these things
1. Whole Raisingania clan is at fault. They should not hide things from Riddhima. This will only make her doubt them more. Especially if the truth is related to her parents.
2. Riddhima needs help, someone needs to guide her in right direction. Though I am completely opposed to the fact that she took Kabir's help but there is also the fact that she does not have anyone to help her.
3. Vansh maybe he did kill her parents and went to jail. He served sentence for the wrong he did. Riddhima may forgive him in future. But he had no right to hide the truth, as it is she just wants to know one truth about her parents, she was ready to compromise on other secrete after her discussion with Sia. Her parents good or bad, he should not hide the truth thinking it will hurt her.
4. Right now Vansh needs to act real smart. I don't understand why is he letting Kabir stay in the mansion even after knowing his and Riddhu's past relationship. Did he forgot about his revenge on Kabir?
I am hoping this is his part of revenge where he will trap Kabir with Riddhu's help without even both knowing about it.
I think makers are bringing story back to the starting track with some modifications if so then I want Vansh to be aware of each and everything that goes around VR Mansion and even with Riddhu and Kabir. On the way he can guide Riddhima being her very own guardian angel. So when the time comes Riddhu will strike Kabir hard.