I 18 [M] fingered my 19 [F] girlfriend on a public beach and made her cum as people walked by.

Long time lurker, first time poster.

If you want to skip the context just go past the dotted line :)

A few weeks ago, following sex, my girlfriend was inspired to tell me about her summer challenges. Her friends created a series of activities (primarily scandalous) to gain points in competition with one another. “Hot Girl Summer” also featured individual assignments where they could earn an inflated amount of points.

The other girls challenges were bullshit. “Hangout with X for 3 hours, make out with X, go to X party.” This in contrast to my girlfriends 3 personal challenges:
1. Public Sex (of any kind),
2. sex on the beach,
3. and anal.
Seems pretty intense in comparison huh?

Well, despite the inequity presented, it gave me and my girlfriend some new things to try, and our vacation destination was the perfect opportunity. We landed in Hawaii a few days ago with my parents, but we hadn’t had a ton of time alone until…

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The crimson, pastel flavored sky kissed the ocean goodnight and invited an opportunity away from my parents. We informed them we would be taking a considerable stroll down the beach.