A first cousin of Aishwarya Rai(estranged wife of Tej Pratap Yadav) was inducted into the Rashtriya Janata Dal (RJD) here on Thursday, in a move that may be aimed at checkmating political rebellion by in-laws of Tej Pratap Yadav (elder son of Lalu Prasad) in the run-up to assembly elections in Bihar. Karishma Roy, a dentist by profession and grand daughter of former chief minister Daroga Prasad Rai, joined the RJD at its state headquarters in presence of the Tejashwi Yadav.