New Delhi, Oct 06 (ANI): Reacting to the new rape case registered against controversial self-styled godman Asaram Bapu and his son Narayan Sai by two sisters from Surat, JD (U) MP said that strict investigation should be done in the case. According to reports, two sisters have lodged rape cases against Asaram and Narayan Sai alleging sexual assault between 2002 and 2004. According to the FIR, Asaram raped the elder sister at Ahmedabad ashram and his son raped the younger one in Surat between 2002-04.