I am not understanding the significance of the dialogue P said about her roots in the house are strong so she doesn’t worry…..
I did mention this in my review 1-2 days back... I don't know if you read.
My interpretation is this...
Sai tried hard to establish herself in the house. She did bond with few members and got along well. But those were side ones. Not the strong ones like BK or Sonali.
P on the other hand, bonded immediately with BK... more than MB even ...right from the start she understood who holds the key... so she ingratiated herself towards BK.
Over time, P created an image of Sai in everyone's mind. An image that Sai doesn't care for anyone, is muhfat, only thinks of herself.. is ready to steal and rob the happiness... everything which she saw happening to her and V's relationship because of Sai's arrival.
In a way gaslighting everyone and establishing herself as the best counter of it all. If Sai is black, P is white. Everyone now looks at Sai through this lens, especially post leap. Which is why no one has introspected or realised their mistakes... because the black went away and they got the pure white version for themselves.
It's ironical that oldies like BK and now even Ash fell for it. Technically they shouldn't. It seems like they never read Sai or even if they did, they have forgotten it. Isliye everyone keeps repeating ki Sai iss Ghar main vapas aayegi. She won't... they should know it. Thankfully V does. Atleast till now he does. I don't think he doubts that she will come even if he asked.
I guess this is what P meant today... jaade majboot hai. Even if she dies tomm (which she diesnt know or hope) Her hold and her importance in the house is not diminished. She will always be the example that everyone will told off. Sai and K will have to compete with her even in her absence.
Unless she commits a massive blunder or has done one already that will open BK's eyes.