with brother or sister

It is understood herein that Adharma, Irreligion, was also a son of Brahma, and he married his sister Mrsa. This is the beginning of sex life between brother and sister. This unnatural combination of sex life can be possible in human society only where there is Adharma, Irreligion. It is understood that in the beginning of creation Brahma created not only saintly sons like Sanaka, Sanatana and Narada but also demonic offspring like Nirrti, Adharma, Dambha and Falsity. Everything was created by Brahma in the beginning. Regarding Narada, it is understood that because his previous life was very pious and his association was very good, he was therefore born as Narada. Others were also born in their own capacities, according to their backgrounds. The law of karma continues birth after birth, and when there is a new creation, the same karma comes back with the living entities. They are born in different capacities according to karma even though their father is originally Brahma, who is the exalted qualitative incarnation of the Supreme Personality of Godhead.    (More...)

Kalakanya was sent by Narada Muni to Yavana-raja so that she might become his wife, but instead of accepting her as his wife, Yavana-raja accepted her as his sister. Those who do not follow the Vedic principles are unrestricted as far as sex life is concerned. Consequently they sometimes do not hesitate to have sex with their sisters. In this age of Kali there are many instances of such incest. Although Yavana-raja accepted the request of Narada Muni to show respect to him, he was nonetheless thinking of illicit sex. This was due to his being the King of the yavanas and mlecchas.    (More...)