Huh???
I am not aware of another mother of God, or mother of another god.
Nine months of being pregnant? Is that what was asked of her? As a matter of fact, if memory serves me correctly, Mary wasn't asked but was told.
Mary Said "let it be onto me" and then he angel departed. So, she consented. It could not have been otherwise.
Her work was the rearing of Christ, to her He was ovedient; Him she encouraged to begin His work of miracles; Him she followed around; Him she saw flogged and dying at the Cross; to her He gave us as children.
It is true that possibly other women likewise lived a life ot total dedication to their sons, saw them die an agonizing death and assumed responsibilities for their followers afterwards. However, we have one Lord Jesus Christ, and one Mary His blessed mother.