So juhi has finally admitted to herself that she lied about mishti being neil's child and the child is her and vidyut's, and that she wants to protect this secret at all costs. Juhi is scared of vidyut, but mostly due to the fact that if he gets to know that she lied to neil and his family about the child being neil's he will expose her.
So this proves that juhi lying to neil about mishti's paternity was never a joint plan of vidyut and her, and that right now she is not negative, but just incredibly selfish and insecure about what would happen to her now that she is out of rang mahal, and that she has nobody in this world apart from her daughter, so she lied that the child is neil's to ensure her own security.
So she this confirms that juhi will become negative just to hide mishti's paternity truth, and will team up with viyut for this selfish reason. She will tell him most probably admit to lying about mishti being neil's daughter to vidyut, and agree to fool avni and neil by making a deal that he doesn't reveal that mishti is his child. So juhi right now is just grey, but will probably turn negative.
The other thing I learnt about juhi was that neil was right about juhi having completely changed, and that everything he thought about her, which us audience can't see in her, such as the whole jalti mishaal (LOL) thing and her being stronger, standing for truth was who she used to be when he knew her before her going missing, and now she has become a different person due to her ordeal. So the whole RP taking her and the brothel thing was not a lie or set up.
All her lying began with mishti's paternity, and then endangering neil and avni's life through this lie over and over in a selfish bid just to get her daughter. All this is less about her daughter's safety and happiness, and more so to do with the fact that juhi feels that she has nobody apart from mishti and the only person she can rightfully call her own.