When i hear Sai say your master plan of doh kashti pe savaar, i dont hear a sexual connotation to it. I think it means that what she said- trying to do two things at once- fulfil a responsibility because of promise to KJ and still be a friend/support to pp too. Fulfil his promise to her too. But over time the lines have become blurred. They are living together, they are starting to unconsciously act as husband-wife and whenever Sai reflects on that she gets upset/angry at herself and virat because their relationship is not just a deal/contract anymore....And now with Samrats entry Sai will be looking at Virats reaction- is he truly over pp like he claims to be- saying she is bade bahi ki biwi or is he simply trying to be happy for Samrat- pp because he cant change what has happened. I dont think Sai is saying you are having a relationship with two people at once. But she does feel "led on" as a wife by his actions only for fate to give her cruel reminders of the reality/truth of their relationship. When Virat got married to Sai, he was trying to be everything at once- pp's kandha as well as Sai's. Now in his head he is clearly over pp. He has seen pp's real intention but he is still giving her benefit of doubt n wants her to give her relationship with samrat a chance.... I'm not sure why virat looks so upset/shocked when Samrat declares that he doesn't want to hear about pp or that he is going to make her azaad or in precap when he declares divorce. What did he think Samrat would do?! How is Sai supposed to feel seeing pp pine over virat so obviously. And say things like- you have moved on giving me dhoka , breaking my heart etc etc. They know nothing of the full story, and virat doesn't want to tell them. He just wants them to move on
Even I fail to understand Virat being so clueless and delusional...when it comes to Samrat's words or Sai's words as well