It was a genuine qurstion. Mary as the Holy Spirit is something I read somewhere, but I don't recall where. It's wrong, of course, but I'm not fully versed enough in Orthodox and Roman Catholic beliefs to know whether that might be some aberrant teaching of theirs. The fact that "Queen of Heaven" is an acceptable title to them (or at least some of them), as well as titles such as Co-redemptrix, as well frequent depictions of Mary and Christ as a child led me to wonder. It is almost as if the Trinity is considered to be God the Father, Jesus the Son of God, and Mary, the Mother of God, the "Holy Family". It's possible that's how Muslims understand the Trinity (or at least Muhammad did). It's my understanding that Muhammad got a lot of his aberrant views frow Nestorian or other heretical Christians that had fled to Arabia. Muslims seem very hung up on and appalled at the idea that God could have a son.

"Mother of God" is a title that I wince at since "God" cannot have a mother, although Jesus certainly did, in His humanity, and He is God. But I would say Mary is the mother of His human nature, not His divine nature, which I'm sure orthodox Christians would agree with, though I wouldn't use the title Mother of God, since God includes also the Father and Holy Spirit.