Correct. God is the triune Godhead, Father, Son, and Holy Spirit. In the NT God (Theos) generally means God the Father. So Mary is correctly called "the mother of Jesus" in the NT, never "the mother of God".
However, Maryolatry entered into the the Orthodox and Catholic churches quite early. The Council of Ephesus (431 AD)proclaim Mary to be "Theotokos" (Mother of God).
113 Canon. 1. If anyone does not confess that God is truly Emmanuel, and that on this account the Holy Virgin is the Mother of God (for according to the flesh she gave birth to the Word of God become flesh by birth), let him be anathema (condemned, i.e. excommunicated).
Then the Catholic church added the Immaculate Conception and the Perpetual Virginity concepts, and the dogma of Mary went on and on, until she was regarded as the Queen of Heaven. However, according to the Bible, a pagan goddess -- Ashtaroth or Astarte -- was called "queen of heaven" .
But we will certainly do whatsoever thing goeth forth out of our own mouth, to burn incense unto the queen of heaven, and to pour out drink offerings unto her, as we have done, we, and our fathers, our kings, and our princes, in the cities of Judah, and in the streets of Jerusalem: for then had we plenty of victuals, and were well, and saw no evil.
But since we left off to burn incense to the queen of heaven, and to pour out drink offerings unto her, we have wanted all things, and have been consumed by the sword and by the famine.
And when we burned incense to the queen of heaven, and poured out drink offerings unto her, did we make her cakes to worship her, and pour out drink offerings unto her, without our men?...
Thus saith the LORD of hosts, the God of Israel, saying; Ye and your wives have both spoken with your mouths, and fulfilled with your hand, saying, We will surely perform our vows that we have vowed, to burn incense to the queen of heaven, and to pour out drink offerings unto her: ye will surely accomplish your vows, and surely perform your vows. (Jer 44:17-19; 25).