When I was younger I didn't have any boobs. I really didn't need a bra and didn't wear one a lot of the time. Nobody noticed. When I did wear a bra it was one of those "nearly A" ones. I didn't fill it out.
When I was 9 weeks pregnant I woke up and looked down and there were (for me) two s staring me in the face. I hadn't even got out of bed when I noticed them. They were so big that I just laid there blinking at them for a minute or two. I was astounded by the sight.
Bobby walked out of the bathroom and I exclaimed, "Look, Bobby!"
He looked over at me and I didn't have to tell him what to look for. He said, "Where did those come from?" He had a huge smile on his face if I remember correctly. He promptly broke them in.