My theory is that I am 99.9% sure that this baby (if it exists) is not Rachit’s. Either the procedure never happened or it will fail for some reason.
So from what I can tell, Rachit arranged for the surrogate before he “died” and smuggled Sampada out of police custody to do the procedure. Their plan was to trick KalMa into thinking that Sampada is bearing the child but really use a surrogate. Unless Atharva is working with them, there is no way they could have anticipated Kalyani coming to the hospital and all this chaos happening. Rachit in the meanwhile wanted to trap Mai so that he could blackmail Kalyani later. Most likely Sampada figured out what happened in the hospital and told Rachit who decided to use this to blackmail Kalyani.