Must have really believed.
When the angels told Mary that she was pregnant, Mary obeyed. But when other people found out, they were mad at her. Not even her parents would believe her. If you have a big belly, that means you have a baby and you did the thing that makes babies. If you do that before marriage back then, you could get killed. This was a really big jump for Mary, but I am sure she let it all go in God's hands!!!
