Why Sonia Gandhi turned down the Prime Minister post in 2004?

Sonia Gandhi turned down the Prime Minister post in 2004. Sonia Gandhi was born in Italy and took Indian citizenship in 1983. the Congress party fought under his leadership in 2004 and defeated the Vajpayee government. Sonia was the party president at that time. In an unexpected development, Sonia Gandhi refused to become the Prime Minister. He had carried the name of Manmohan Singh forward. Under Sonia's leadership, the Congress party won in 2004 and 2009. Sonia said that her inner voice had told her to "politely decline the position". Later, former External Affairs Minister Natwar Singh claimed in his book that Sonia Gandhi was stopped by her son Rahul Gandhi from becoming PM in 2004 because he feared for her life. However, the Congress party denied his claim.