Today's episode was so confusing, it seems like they're changing script and it was not their initial plan what they're showing right now or rather they don't know how to move forward from this point of story.
But one thing is sure they get it that they need to bring a major twist to stay in trp race coz audience are strictly not interested in this.
What I feel by making Sai against Pakhi as Surrogate they're making a base for Sairat's separation. Right now Sairat are back to normal, specially Virat, Sai doesn't seem like she'll let Pakhi's manipulation work as she seems firm in her thoughts, plus Virat is also looking firm as Sai's husband, he's clear that he wants a baby and has hand over all the responsibility to Sai to arrange everything as per her and he'll support her, until and unless something major happens, don't look like their relationship will shake.
So I think, somehow by hook or crook, Pakhi will become Surrogate, Sai is already in opposition and all family knows, she might have to accept it half heartledly, but will be vary of Pakhi, but something will happen and Pakhi too will have miscarriage and blame will fall on Sai, even Virat will believe it, coz it'll become unbearable for him to absorb the loss of another child, CN and Virat will oust Sai or Sai might leave house voluntarily and she might discover herself pregnant and deliver with the help of Kavita nurse and leap.