Mary, like Eve before her [the mother of all living (flesh)], as the carnal mother of the man of flesh, Jesus, is only a type or shadow of the Real Mother.
The Real Mother, the one who bears the children of God is the Church! That is not Eve nor is it Mary [Joseph's wife].
"And Naomi said unto her two daughters in law, Go, return each to her mother's house: the LORD deal kindly with you, as ye have dealt with the dead, and with me." Ruth 1:8
Which mother was Naomi speaking of? And then which Mother did Ruth choose?
"And Ruth said, Entreat me not to leave thee, or to return from following after thee: for whither thou goest, I will go; and where thou lodgest, I will lodge: thy people shall be my people, and thy God my God:" Ruth 1:16
Orpah went back to her natural mother, but Ruth, a gentile as we are (or have been) gentiles, chose a new and better Way, a better Mother.
And then...
"For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.
But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise.
Which things are an allegory: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar.
For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children.
But Jerusalem which is above is free, which is the mother of us all." Gal 4:22-26
"So then, brethren, we are not children of the bondwoman, but of the free" Gal 4:31
"Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God.
Nicodemus saith unto him, How can a man be born when he is old? can he enter the second time into his mother's womb, and be born?
Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God.
That which is born of the flesh is flesh; and that which is born of the Spirit is spirit." John 3:3-6
So who or what is Jerusalem? One literal translation of the word Jerusalem: "set yet double peace". [That brings to my mind the double portion that Jacob gave to Joseph. But that's another and a perhaps deeper subject.]
"And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea.
And I John saw the holy city, new Jerusalem, coming down from God out of heaven, prepared as a bride adorned for her husband." Rev 21:1-2
Consider also that a Mother has children. We know how Ruth (Bride) had children effectively for her dead husband the son of Naomi (Mother Church) via Boaz. We can make it complicated, but it doesn't have to be if we trust God to help us in it:
"There are threescore queens, and fourscore concubines, and virgins without number.
My dove, my undefiled is but one; she is the only one of her mother, she is the choice one of her that bare her. The daughters saw her, and blessed her; yea, the queens and the concubines, and they praised her." Song of Solomon 6:8-9
The Church is the spiritual Mother that took us in and nourished us properly with the flesh and blood of Jesus so that we could have the Life which he is... so that we could speak that words of the Father as Jesus did... so that we could walk the walk that Jesus walked along the "highway of holiness".