You have stumbled upon one of the great religious debates of human history. The short answer is that it depends on which sect you belong to.
Not all Christians agree that Jesus was divine, as terms like "Children of God" are thrown about quite loosely.
Mark probably didn't think Jesus was divine at all, John clearly did.
The whole "God gets a human woman pregnant and she gives birth to a demigod" part comes from polytheistic Greek mythology. The Greeks had no problem with multiple deities.
Some monotheists claim Jesus was just God, that there's only one of them.
And then you have the trinity. There are three Gods, but really only one God.
Although it's irrelevant, some of the old references to the Old Testament deity YHWH do mention his wife.
Also, there were some early Christian sects that believed that Jesus was the biological son of Joseph, who had knocked up Mary but was going to make an honest woman of her, and was adopted by Yahweh when he was baptized by John the Baptist.