Am sure I posted this story previously - we were on holiday in 2006 with another couple. - my wife's best friend and her husband (we were all boyfriends and girlfriends in those days)
Wife's friend had "warned" me she would be topless the whole time and I feigned indifference but in reality I had never looked forward to a holiday as much as this one
My wife on the other hand was (is) very body conscious and refused to ever go topless - she had large breasts from an early age and always kept them covered.
Towards the end of the holiday, our last day on the beach she was attempting to change out of her swimsuit and into a vest top. She struggled with towel and tops whilst keeping her modesty until she got pissed off, said "fuck it" and lowered her top, unleashing her GG breasts for all to see for the briefest of moments while she pulled her vest top down....
My mate missed it and his misery was compounded when I told him later she'd flashed them for a few seconds
We've evened that up in recent years of course