Dear SK, To my knowledge (Bhagavatham) and Radhikopanishad and Narayaneeyam are the only the authentic source about Radha. Rest over time general public twined spicy stories to Radha's life which may not be true. According to the authentic soruces Radha was the daughter of Gopanna Maharaj and a cosuin of Krishna. She of the same age of krishna and never married anyone else except the Gandharva marriage to Krishna. http://veda.sakthifoundation.org/radhakrishna.htm We can continue our discussion here.