I finally understand up shagun plan

airhead get married to mani to be in safe side she will create riffe between ishra & distroyed family bonds from out side by using pihu as excuses to come to ballah house , she will create problems to show them her importance and value no one will suspect her she is married to mani that mean for mani no one will take legal action againts her when her true face come out she will used the file as last step