Yes - I suspect there are probably a number of pics of her at the beach or at the gym circulating out there. But generally, she dresses rather modestly, so when she is just out there going about her business, most men would probably not notice her breasts - they would probably think that she is just a bit chubby, because of the loose clothing---not knowing that the only thing chubby about her is her bustline.
This "candid" was taken just at the right moment, as she was going to put a loose jacket on to cover her ample bosom before dashing out.