Sai's lines unke zindagi meiin naye log aa gaye hai means she has accepted that he has moved on. It is Patralekha's name that will come as a major shocker to her.
PREDICTION
What I feel is Virat will twist it to something. Virat and Sai will maintain the doctor and father of her patient relationship till they get Vinayak treated. In the meanwhile, they will slowly come to know thoda thoda ki what transpired.
How Patralekha will be in the mix, I haven't thought about it so far but one way to shock the wits out of everyone could be that she could surprise Virat and Vinu a day before they were actually planning to return
Didi walking in on Sai and Virat + the pillus: