The show has become too unpredictable, like kuch bhi ho rha hai, and one thing is clear this track was brought in just to buy time and think how to move forward, coz it didn't really serve any purpose in larger scheme, also Jagtap's ehsaan chukayega, cannot be taken seriously, they just randomly writes dialogues, he might or might not come, remember even Samrat blessed Sai's womb, but what happened we all know.
Now coming to Surrogacy, I don't think so ab miscarriage hoga, Pakhi will mostly give birth and maybe to girl, coz Kaku is doing too much Pota, pota, it's funny Virat wants Girl, Kaku wants Son😂, but there might be some Gyan from Sai and Virat loading regarding the equality of boy and girl child.
As per future separation I think your prediction might come true, Pakhi's Surrogate child will be same like Sai and will remind Chavans and Virat everyday about Sai, Sai may give birth to boy, and kaku might pressure Virat to bring her back for her chirag, or there might be possibility that after separation Sai will adopt a child, coz right now Sitara FLs fostering a child, trend is going on in SP, Anupama, lmlie have gone the same route, maybe Sai will be next, don't know but the plot is becoming too Messier, I hope from the end of this week, it'll be clear where this track is heading, no more filler dragged episodes now please.