Yes but Kaku and pakhi won’t keep her .. and why will they agree for pakhi to be a surrogate..
so long sam was alive .. pakhi was tied to him.. now she can marry virat .. and virat having 2 wives is not an option remember shruti fiasco . So Sai will have to give a divorce to him and set him free .. which will eventually be her ticket out for freedom ..
Sai being preggers was her tied to Chavans .. and they can have months of trauma for her .. with pakhi trying to kill the baby and Bappa saving it
For Bhavani~~ Chirag is important.. by hook or by crook.. and Sai will do anything to please chavans as it’s quite evident given the recent tracks as to how her character is just turned into just another typical ITV FL! Pakhi is calling the shots (the way she said ki tum yaha se nikalo), so obviously Samrat being dead doesn’t matter, she will continue to live with the chavans.. about the promo “Some Mrs Virat Chavan”.. Didi is going to fake some mental breakdown or memory loss... and think that she married Virat five years back and Sai was his zimmedari as an outsider...also the doctor will believe her coz everything’s farji in GHUM... , so given Samrat’s promise and Virat toh hai hi apna vaada boy will somehow convince Sai to pretend as an outsider.., and Pakhi will become the new mrs. Virat chavan... or maybe some other shit they will show or like you said “Sai under the guilt will divorce as per your theory”.. this promo could be misleading as well like a lot of times they have shown fake promos to gain attention and TRP... and surrogacy is end game...!!!! Why else would they make Sai pregnant and all the one-liners of Pakhi and sai fainting scenes...
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