Is it that, after Shivaay got the copy, did Pinky bribe the doctor, and he is the one who called up Shivaay saying that there was some mistake with the report and it is a match?
And, what is the use of kicking out Nayantara before Shivaay's return with the reports? Since she said that she had changed the reports, shouldn't Nayantara be there when Shivaay comes with the reports? Wouldn't Anika want to see her mother once it is cleared that Nayantara is her mother? Wasn't Nayantara's presence the most important now, if she wanted to create more issues with Shivaay and Anika regarding Anika's mother?
So, what did she plan to achieve by kicking out Nayantara without paying her the full money? After all that did she think Nayantara would continue the act when the need arises?