Mandhira Kapur, deceased billionaire Sunjay Kapur's sister, claimed Sunjay's firm Sona Comstar's board members locked her mother Rani in a room and made her sign documents. "I was there, banging on the door...I know doors were locked," Mandhira said. "For me to see how my mother is sitting today, with everything being stolen from her, this is personal," she added.