Businessman Robert Vadra and his mother Maureen Vadra will appear before the Enforcement Directorate in Jaipur on Tuesday for questioning in a money laundering case. Mr Vadra, the husband of Congress leader Priyanka Gandhi Vadra, was grilled for over 24 hours altogether for three days last week in another alleged money laundering case on purchase of a property in the UK worth 1.9 million pounds (approximately Rs. 17 crore).