No, the Trinity is 3 person of 1 nature, not 3 persons of 3 natures (polytheism) or 1 person of 3 natures (???) etc. 3 Person (Father, Son, Holy Spirit) of one divine nature (God). All encompass infinity in everything; there is nothing one can do that the other can’t, except in terms of their relationships to each other (Father begetting Son, Father + Son begetting The Holy Spirit.)
She was the Mother of Christ, 1 person of the Holy Trinity, who is FULLY God, so she is the mother of God. Not just the person of Christ, but the Divine nature of Christ too… and since there’s only 1 nature, she’s the mother of God.
This is a mystery to understand in human terms, and I’m not even sure how it all works, but I have hope that I’ll understand completely in heaven