This is all thanks to Chavans and Patralekha. It was just matter of time that Sai and Virat would have come closer, but Chavans and Patralekha just fast forwarded the process. (by various taunts, insults, Tumhari biwi, tumhari Sai etc)
They are all are forcing Virat to see from Sai's point of view and manao Sai everyday to keep her happy. This way they are creating new happy memories that has only them.
This is also helping Sai heal her aaba loss and Virat forget his 2 takke ka oops i mean din ka pyaar.
I really hope that after Shivani leaves their room, we get a cute scene of them together having dinner or discussing Sai's bhavishyavani of not having dinner. Good that Ashwini kept food in their room, they can share it đ.
Sai was looking so beautiful in that new dress of hers and for sure want to see some niharofying from Virat and him remember the way she fought for his bua.