Now do you get it

One more thing... All those who bashed dev and specially sona for speaking out. I hope now you understood why. Here she politely gave ishwari the money and she is told to go out of house as its insulting. If she had refused or talked back at any point of time don't you think same would have happened. And if dev would have said something same blackmail of leaving the best not needing mom would have been dished out to him. So all this point sona was quiet it was not pleasing ishwari but indirectly saving her own marriage. Ultimately her fear of ishwari did come true.