My first serious girlfriend basically always went topless whenever we visited a beach. We usually preferred to travel by ourselves, so there usually wasn't anyone who we would know who would see her topless. But one time we had a day out to the beach with her family. She was the only one topless in our little family group, neither her mom nor her younger sister went topless. It was fucking exiting to see her interact with her family while topless and everybody else pretending it was completely normal or pretending not to notice anything unusual.
It was also funny in some way.
Mom and dad pretending there wasn't anything unusual. The boyfriend of my girlfriends younger sister pretending not to notice my girlfriend was topless. The younger sister pretending she wasn't a little jealous of the attention my girlfriend was getting. Her younger brother, well, who knows what he was thinking? And me pretending this whole situation wasn't at all exciting for me.