incest

 The Bhavishya Purana, the Skanda Purana and the Varaha Purana narrate that some of Krishna's junior wives were infatuated with Samba, the handsome, trouble-maker son of Krishna and one of his senior queens, Jambavati. One wife, Nandini, disguised herself as Samba's wife and embraced him. For this incest, Krishna cursed Samba 

1. to be inflicted with leprosy and 
2. his wives to be kidnapped by Abhira robbers after his death.