In a shocking twist in the murder of Rohit Shekhar Tiwari, son of late former Uttar Pradesh and Uttarakhand chief minister ND Tiwari, his mother Ujjwala Tiwari on Sunday levelled serious allegations against wife Apoorva. Rohit Shekhar’s mother said that Apoorva and his family wanted to usurp the property of her sons Rohit Shekhar and Siddhartha.