Shruthi I am not denying the fact that Sudha is harassing dadi but what is happening next is all dadi's acting ability. The way Sudha tried to manipulate Ladoo by making Narotham lose his game, Satrupa advising Ladoo that having cold Water after playing is bad for health and handing him normal water and also having the water from the same pitcher made Ladoo believe in her and the brushing stroke was handing him the cap and bat not as gift but as PRIZE for his well play. She boosted his confidence and now even if Anami or Sudha openly tell him that Narotham allowed him to win, he will not believe as he feels Satrupa will never lie about his capability. She has paved one step closer to the kid.
Dadi is taking her hysteria and whispered that Sudha will not allow her to live and took and assurance from Anami that, nothing wrong will befall on her as Anami is with her. It may not be the story telling to Ladoo will make her decide on sending Sudha to the out house but that instance will make her believe in dadi's words about Sudha inducing fear in her.
Off course neither dadaji nor BD will be aware of her acting as they are truly worried for her. Let's see how the screen moves ahead and show the actual scenario.