There are some many incident happended which prove Nitya change i.e.
Before Kavya dead and before left the house when Ved was crying she went to get him and Vancita excused her for harming Ved. She was bounding with Ved form then.
Then when Kavy and Anjali where living the house she true felt bad of them leaving. But she want admit but the she surrended if she was fake why would renderself in front whole family think about it.
Then when Kevya dead she went through a whole year depression then only show few days. In the few show she was crying by helf if she was evil then she would talk about in her own room.
Then when Nirmla come in the house she try make Anjali life hell but Nitya was the only one stick like mother.
All these clue show that Nitya is getting frame by Nirmale because she hate her and she want the poperty and I bet she trafferred into Kavya and Anjali name I bet you.
So what if Nitya had the plot paper made she kept because she felt that Nirmale harm Anjali. But Anjali has misunderstood her.
I just hope the really killer come out. But I admit I had miss the Fight between Anjali and Nitya it was nice this after long. But we all Nitya acting, I still she get prove inconnent and I hope Soham is Kavya because it KavyaAnjali make show. I hope this plan of Kavya and Nitya expose the really killer.