I haven't seen this part in KD, but I wonder how much of it is because of the family and how much of it is because he is worried about Sai's reaction/wants to surprise her. Rono and Virat are not the same. Think about it. How excited was Virat to celebrate his wife's birthday. He does not give a damn about Paapi or how she feels at this point. So, I don't think it fits in his character for him to be hesitant in telling everyone. It makes more sense for him to want it to be a surprise and then Sai (understandably) misunderstands him. Or, that he is worried that Sai will not go with him due to the vaada and she will again question him why he is taking her and he won't be able to answer because of his fear of losing her.
Yeah could be. I also didnt understand full dialgoues. But when Pakhi starts poking him and talking about 'honeymoon', his expressions were like Yes it is honeymoon so what? 😆. But Sai keeps butting in between to correct him into official trip (secretly hoping it is honeymoon afterall). It is so funny till it ends up otherwise 😒