Igerna 

According to legend King Arthur was the illegitimate son of Igerne, who was the wife of the Duke of Cornwell, who was raped by Uther Pendragon while under the enchantment of of a magician called Merlin.

Igerna, somewhat like Mary, became pregnant not by her husband, yet suffered no disgrace because she accepted the copulation while under the influence of a magician called Merlin.  Mary, because she had sex with a representative of God. (See "The Second Messiah" p 107)