Before pregnancy she was wearing bras called "almost a B." Her breasts were small. (Not to worry ladies, I liked them. As you say about male organs, "Size does not matter.")

While pregnant her breasts started to grow. (Of course. The physical food plant is coming online. There will soon be a hungry mouth to feed.) They grew a lot. Now she is like a D cup.

If every woman gained 2+ cup sizes with their first pregnancy…well, that just seems silly.

What is the typical increase of breast size resulting from pregnancy?

Did that diminish when you stopped breast feeding?