I think Ps insecurity is not about her position in the family or as Vs wife....its insecurity about her position in his heart
As right before the reveal she thought about confessing her feelings and thought V would accept her and move forward with her
now her insecurity is the woman that was in his heart is back in the picture so she can't take that place
all her insecurities are about V not noticing her V not asking her opinion not about the family or her status the sindoor is still there and her roots are still grounded in CN
Shes insecure about whats in V's heart
which is why in the precap she is bringing up Sai not Savi, Sai will be aroudn more , you will see Sai more etc etc
and right now in Vs heart is just Savi (and alil vinu) so V snaps back about why is everyone trying to keep him away from savi
but they aren't trying to keep him away from Savi they're trying to keep him away from Sai lol cause they know he will melt