Today Shastri ji said, ---- " Jis Rajpurohit ki patni use Parityaag kar de" meaning the Rajpurohits wife themselves shuns or sacrifices her husband.
These words are continuously ringing in my ears so I decided to write something on it. This Vrat is very necessary for Dev and Rads to re-unite b'coz after the marriage Rads, who is the actual wife had sacrificed her husband, Dev, the Rajpurohit on her own will. She had gifted him off to her sister,Visakha. So now when Rads is trying hard to re-enter into Dev's life as his wife, Dev will have to go through this penance so that they can once again become one in true meaning. Dev had insulted the marriage vows by unknowingly staying with his sis-in-law and Radhika had committed the sin of sacrificing her husband and allowing him to stay with an unmarried girl. So for them to re-unite and form a strong bond they need to go through this hard Vrat as they are the RajPurohit and RajPurohitain, the torch holders of the Dharma.