Some analysts believe that it suits Prime Minister Narendra Modi at this stage to debunk the image of Sonia Gandhi as a woman who declined the prime ministership of the country with great personal sacrifice, just as it would suit him to portray Rahul as a coward who was afraid his mother would be killed --  claims made by former Union minister Natwar Singh in his yet-to-be-released book. Rediff.com contributor Renu Mittal reports.