Lol at totally not reading the question.
From an anecdotal perspective, I can definitely say that working your pecs does make your boobs appear bigger, though that's not a given for everyone. By benching or just working out in general you're obviously going to lose some body fat, which can impact some women more than others in the breast department and may totally counteract the growth in their pecs. There are a lot of strong women out there who have the chest of a twelve-year-old and some who are definitely more gifted.
From a scientific perspective, most of the studies I've found have more to do with poultry, which I'm not sure is all that relevant. This is the closest I could find: http://www.examiner.com/article/new-bra-necessity-study-an-exercise-science-perspective
To summarize the article, they're saying that not wearing a bra makes your pectorals work more to support your breasts and therefore keeps them perkier. Just like any muscle, you use it or it gets flabby. By that theory, if you're benching or otherwise working your pecs it should have the same effect as not wearing a bra, and therefore gives your breasts a perkier/larger appearance.