Why did neither of the two sons come to offer funeral rites to Subrata Roy?

nationaldesk:
Businessman Subrata Roy Last Rites: Sahara Group founder Subrata Roy was cremated on Thursday (November 16) in Lucknow, Uttar Pradesh.  Grandson Himank Roy lit his funeral pyre.  Subrata Roy's two sons Sushanta and Simanta Roy could not attend the funeral.  The reason for this has come to light.
When people asked Subrata Roy's wife Swapna Roy the reason for their sons not coming, she told that they were abroad and could not travel due to some reasons, hence grandson Himank was called from London, who burnt Subrata Roy.   Himank is the elder son of Subrata Roy's younger son Seemanto and studies in London.
 Many well-known personalities had come to bid farewell to Subrata Roy.  Uttar Pradesh Deputy Chief Minister Brajesh Pathak and former CM and Samajwadi Party chief Akhilesh Yadav also came to pay tribute to Subrata Roy.