God the Father has sex with the Mother Goddess to produce Mary so Mary is a daughter of God the Father. In order for Jesus to be born, God the Father had to incestuously have physical sex with his own daughter Mary to produce Jesus.

Was Jesus born of a virgin? Jesus may not have been born of a virgin.

Even though Mormons are usually quick to say they don't know how the conception of Jesus took place and allow for the possibility of something like artificial insemination, they all claim that Jesus had the Heavenly Father and Mary as parents. So the Father's seed was somehow implanted into Mary, His spirit-daughter.

Mormon general authorities on the other hand have claimed that the conception of Jesus was perfectly natural despite the Book of Mormon teaching that Mary was a virgin when Jesus was born (1 Ne. 11:18-21; Alma 7:10; The Complete Discourses of Brigham Young 1:321; Young, The Journal of Discourses 1:50-1; 8:115; Heber C. Kimball, 211; Orson Pratt, The Seer, 158-9; Family Home Evening Manual [1972], 126; and McConkie, Mormon Doctrine, 546-7, and 742-3).
Jesus was born of a virgin.

Just because Jesus was eternally the Son of the Father does not entail that Jesus was not the Son of the Holy Ghost when He was born of Mary. The act of conception was of the Holy Ghost, and not of a man. Mary was with child and still a virgin (Mt. 1:18-25; and Lk. 1:26-35).