"Even Jashodaben has been living at her father's home and spending her life working in the education sector," Somabhai said.
"The incident (Modi's marriage) which had occurred 45-50 years ago is to be seen in the background of a poor and traditionally orthodox family," he said.
Somabhai said that Narendra Modi's current status should not be evaluated on the basis of "an incident" that had occurred 45 to 50 years ago.
Praising his younger brother, he said, "Narendrabhai was different amongst the six siblings. His interest in the service to the nation was quite apparent to us.
"But nobody could have estimated the intensity of his idea of service to the nation. He was also very influenced with the sacrifice and dedication of Swami Vivekananda and Lord Gautam Buddha."