It's a variation on tthe theme of what you are discussing about Eve and the reconciliation with Adam - and in fact it is written into the Grail story using Arthur and Guinevere (and of course Lancelot)
"When Arthur was enchanted and defeated by temptation; the ray of justice or the tongue of the Dragon, punished him and took away his powers. Hunger and poverty came to his people. Only the Grail and Guinevere could give him back what he had lost. His Queen, his wife - only she kept the sword and only she had the capacity to offer this. This is also an allusion to the Alchemical Wedding"
"[....]Lancelot is called "Of the Lake" as it is he who must work with waters; the waters of life. Man must not lock himself away from the world, from temptation and pain and joy; life must be experienced in all its misery and splendour in order for one to learn and grow. He is the Terrestrial Soul, fused of necessity, to the Spiritual Soul as a symbol, not in the way as has been seen as an adulterous liason between he and Guinevere. Man is a triangle, positive, negative and neutral, that should never be divided or separated."
"The first stage of the Arthurian legend introduces us to one who lives for himself, without direction. Everything is anarchy and disorder, and this is taken advantage of by those who seek destruction and chaos. To correspond with Arthur at this point, is Guinevere, sensual and dedicated to youth and beauty, imaginative, full of illusions - in a process of development. Then we have Lancelot, active, strong, determined to fight in all battles and adventures put before him. Everything is iron will, manifested in the human field, but trapped in immaturity, uncontrolled passion. He has not got the Will of the soul, he is not Master of himself. Because of this, he cannot dwell inside Camelot since he does not dwell within himself"
"In the second stage, all is different - consciousness shines on all levels of the Being. On one side we have the more mature, experienced Arthur, leading and governing his people, in control. He commands with wisdom, force and power. He is more patient, and reflective in all his decisions [....]On the other side we have the more Spiritual Queen Guinevere[...]
"Lastly, we have Lancelot of the Lake, the Human Soul, or superior man, who has become a firm and determined Knight with his own consciousness and will. Body, Spirit and Soul - the triangle of the alchemists, often represented as a deer and a unicorn fighting in a forest....or two fishes swimming in the sea....link. A conscious soul, Lancelot is now protector of his (own)King and Queen unto death. He travels the world as a symbol of the material, terrestrial soul which is within us all, for the development of life and learning the sacred mysteries. "
You see the parallels?