My guess is this for Sai's question that he didn't come looking for her and presumed her dead.
This time if she goes away he knows she is alive and he has a daughter. So he will come for both... not just Saavi.
Like I said in review... P believed that if Sai stays away, V wont remember them much.
But V couldn't forget a dead Sai... will he really give up an alive Sai and a much cherished daughter?
Absolutely!! Or else he didn't have to mention Sai. His concern is "supposedly" only Savi. Then why talk about Sai. He does that quite often these days. His indirect way of saying Sai is also included.