I understand what you are saying but if Ishwari would have been an understanding MIL then Sona would have definetly confided in her.Had she understood that Dev and Sona are newly weds and need their own time and space Sona would have confided in her.Had she understood that Sona is Dev's wife and being a married couple they will go out,spend time and come home late and she doesn't need to know each and every detail of her son's married life,there would have been no problem in the first place.