I think we should not fall into the trap of negative Pakhi & pure soul Sai just yet. Everyone is selfish in love. 😛
Although we have our theories, we still don't know what Pakhi's deal is regarding the past
As of now, she hasn't done anything wrong. She has lived these 5-6 years, considering Virat-Vinu as her family. Sai was never coming back. Suddenly Sai shows up...she is bound to be scared of her entire world being swept from under her feet. Virat was warming up to her a little, trying to move onx assuring her that nothing will change the status quo - now she doesn't know what to think. Given her actions post-leap, it should not be that long for her to discover what is cooking in her husband's brain - let's see what happens.
Coming to Sai...I don't get her. More than Savi...why is she thinking about V & his family? I understand if she is reluctant to tell the truth to Savi if she fears the confusion it might create in her to know that her father has another family...also the fear of breaking up V's family might be a secondary thought too. But her first & only motivation is V...this is the same V whom she felt so heartbroken by that she did not tell about her whereabouts, did not inform she had a daughter. Now, she should be even more indifferent considering the betrayal she has witnessed of V marrying P. What are they writing her character as? I can't relate to Saint Sai Joshi.