Short story which happened while on holiday in Corfu.
I was 22 and my then gf (not my wife) was 18 with nice curves and blessed with a nice D cup with big areolas and thick nipples (DD depending on the brand of bra).
We were laying at the beach, on a relatively quiet stretch a bit away from the busy crowds. Only a few people around, mainly other couples and families with smaller kids (including some women who were topless). My chance to get her go topless in public for the 1st time ... which to my surprise she agreed to. She probably wouldn't have agreed to it on a crowded beach. First laying on her stomach, but after a while also on her back exposing her breasts to the few people around. And she did seem to enjoy the sun on them, the glances she got from others and my excitement

.
At a certain moment she was sitting up straight so her breasts were clearly visible, when a family walked by at about 30 feet). Father, mother, teenage daughter and teenage son (around 16-17). Fully dressed on a hike probably. The son was looking all around at the few topless women and then he saw my gf. His eyes locked at her chest, mouth open staring. When all of a sudden my gf raised her arm and waved at him, making her breasts jiggle. The boy stopped walking, but his mother who walked behind him had seen it all and smacked him on his head urging him to walk along and stop staring. All while throwing an angry look at my gf.
Now everyone around who had seen this scene, started laughing and there was quit some consternation. And me .... I was just proud of my gf and horny as hell