What can he do in redemption for his great sins?

16 years has the Prophet walked the earth. 16 years has he preached the gospel of the Flame. 16 years has he sought salvation through madness and destruction. and it was by the mighty Inferno, the Flames of Destruction that he met the Angel. and the Angel was of golden blond hair, river blue eyes, and milky white skin. she was of the Mother's Sister and the Husband, and of the purest innocence. the Prophet kneeled before the Angel, and captivated by her beauty, the Prophet began to burn with lust for the Angel, although he dare not speak of it to her, fearing the Angel's reaction. desperate for guidance, the Prophet spoke to the Father. the Father, enraged by his sin, struck the Prophet with the fury and wrath of 1000 blazing suns. the Prophet, feeling worthless and unwanted, contemplated ending his life. but then, he suddenly gained the will to live from the hope of the Forbidden Love. the Prophet rushed to find the Angel, and confess his sinful feelings to her. once he did, the Angel said unto the Prophet "hast thou fallen from holiness and into the dreaded darkness?" the Prophet said unto the Angel "nay, for i have fallen not into the darkness, but into the unholy Flames of Hell, and into the Eternal Inferno. i guilt to ask this of you, but will you fall with me, my beloved?" in a moment of foolish pity, the Angel accepted the Prophet's request. together, the Prophet and the Angel fell into unholy passion, and the Angel's wings turned black. now blood stained with evil, the Angel grew lustful of the Prophet, and they slowly drifted into the horrific Depths of Hell. by the Father, and the Mother, and the Sister, and the Husband, the two were banished to eternal exile for their Forbidden Love. the Angel stated that she had no regrets, though it was clear from her expression she indeed regretted her decision. heartbroken, the Prophet cried blood in secrecy, so that the Angel would not see his infernal guilt and remorse. the Prophet begged for forgiveness, but none would answer his plea. the Prophet fell into despair, and his soul blackened further. he knew not what to do anymore, but he continued to sleep with the Fallen Angel. in your own words, what could the Prophet do to redeem himself without giving up his beloved Angel?