What I felt in the episode and why few people felt the disconnect from Sai is because of her previous new found feelings for Virat. If we leave alone BK's crap which anyone would be cringed if spoken in public, especially someone who is still working on their relationship, few things that question Sai's feelings are her complete rejection 'for a moment' atleast of their relation and Virat as her husband. I still believe what she spoke in that moment is not what she feels for him. As I mentioned in my review in Neerja's post, it could be her defense mechanism to reject any possibility of love between the two so she has 0 expectations to start with. This is very defining quality of Sai when it comes to their marriage.
May be we have to wait for today's and later episodes when she cools down and thinks. Sai is more mature and understanding than she shows it outside. And when it comes to Virat, she deliberately shuts her heart. It takes sometime for her to understand and analyze Virat's responses. I am sure she will see how Virat has responded to this situation. She has someone who is ready to play the game according to her rules. She will understand the reason why he is doing what he is doing. This one week will be crucial I think for Sai. The bubble of friendship is broken for sure, she has the seed in her mind and it will trigger her thought process.
Virat on the other hand, does not want to lose whatever little he shares with her. Her not leaving the protected environment of his house is his top priority. I think he is taking one day at a time, still hopeful that there is light at the end of the tunnel. But the difference i noted is, he is not assertive as a husband anymore. He is not stopping her as a husband to stay. Instead he is being accomodating as a friend which I think will send wrong signals to Sai. She will think as in precap he doesnt like the idea of being in the same room. we will have to wait and see how they reconcile their feelings.
PS: I absolutely got confused with the night before conversation of transfer in KD. But here writers are very patient in dealing with Sai's realization. That conversation indeed was very important but showing it in bits and peices here is even better.