@Jeruba
Do you really believe that a woman would be “espoused” to a religious man in those days, go through a pregnancy to the stage of childbirth and no one would notice?
Aside from the mentions in Mathew and Luke, and those don’t give any real detail, almost nothing is known about Mary. There is quite a bit known about marriage and the law in those days however. A woman would only come to a man after marriage, until then she would remain with her family.
Although Joseph was supposedly talked out of divorce by the Angel, that wouldn’t affect the opinions of those who saw a heavily pregnant woman if she was unmarried. As she was with Joseph, not her family, she was either married or living in sin. Pregnant women didn’t wander about unattached without risking stoning.
The whole concept of a virgin birth is as ludicrous as the concept of a God, particularly in view of the strictness of the law with regard to fidelity. If it did happen, then there are a lot of conveniently skipped questions as to how the local population would regard an obviously pregnant women in the company of a man who wasn’t married to her.
Regardless, if you want to believe the Bible, God got her pregnant without so much as taking her out to dinner – not a good look. Nowadays it would regarded as a form of date rape, getting an unaware woman pregnant.
By the way, if you were right, then she was always living in sin, as an essential legal requirement for marriage in those days was consummation with proof of virginity – a blood stained cloth. If she had a virgin birth, then she wasn’t married. The proof of consummation was an essential part of marriage in case the husband changed his mind and wanted the “bride price” back.
Deuteronomy 22:15
Then shall the father of the damsel, and her mother, take and bring forth the tokens of the damsel’ virginity unto the elders of the city in the gate: 16 And the damsel’ father shall say unto the elders, I gave my daughter unto this man to wife, and he hateth her; 17 And, lo, he hath given occasions of speech against her , saying, I found not thy daughter a maid; and yet these are the tokens of my daughter’ virginity. And they shall spread the cloth before the elders of the city.