Women takes a vacation and goes to a sex resort kinda thing (it’s free use) she has to take a class before and there’s a fat guy trying to get with her. On the island like the rich guy takes interest in her. One of the rules is when you’re naked you’re free use.
Source: reddit.com/r/eroticliterature/comments/djlye2/help_finding_a_story
Found it!
https://www.literotica.com/s/the-vacation-trade-off-ch-01