The Son ALWAYS and FOREVER in every moment is coming from Her.My understanding is that the Son is eternal and is begotten of the Father. How then could the above statement be true?
The statement could be true because it is a statement about the Mystery of the Incarnation. The Only-Begotten Son and Immortal Word of God, Who, with His Father and the Holy Spirit, is "God ineffable, inconceivable, invisible, incomprehensible, ever existing and eternally the same", entered into space and time, was incarnate, and became man. He is the Lamb, slain from the foundation of the world. Of course Mary's birthgiving in time and space has eternal significance: the One to Whom she gave birth is the Son of God.