I can only imagine her embarrassment. I remember some years ago when I went to the Maryland coast with my young son and some friends. When we were at the beach, I was wearing terrific looking one piece black and white bathing suit that was llooowww-cut. Two of my friends (an older woman and a fellow), my son and I were playing in the ocean. I dove into the water and when I surfaced and wiped my face and hair back I felt that I was too loose at the top. I looked down and yep, my left breast was hanging loose swaying and jiggling. I quickly but not soon enough, ducked back into the water and dressed myself. And yes my companions (thank goodness not my son) observed but didn't say anything just smiled. I was so embarrassed that I couldn't look the fellow in the eye for the rest of the day.
I was watching a fishing show a few weeke ago where a former Miss America and her husband were out deep sea fishing, and while fighting a big one, she popped out of her top (of course it was blurred). She was laughing about it later, atating how her husband was trying to stuff her back in while she continued to fight the fish.