There won't be much story left if Virat reveals about his marriage with P. BK might plan to welcome Savi alone without Sai in Diwali to send message to Sai that she is not welcome but again does Sai care ?
If my prediction is correct, virat will have to reveal the backstory of pakhi’s marriage. If sai steps in then it has to be as his wife. Otherwise only other possibility is ninads heatstroke 😬. I don’t see sai entering as another woman. Not sure if BK plans something else.