Why shouldn't Sai and Virat NOT be affected? They are not robots. Obviously, they will be. They used to love each other and the residual feelings are still there.
Exactly, just because people are no longer together should just forget each other - par Aisa hota nahi hain. People tend to memories, good bad ugly - par hote hain.
P had her 2 days memory and created havoc in Sai’s life. But Sai itne salon ki memories bhool jayein and be all unaffected - Bohot nainsaafi hain