Reviewed:
The author suggests that we read all the stories related to this one in their proper order. I haven't done that. I thought you should know.
Basically, Jenny and her family go to the beach with Greg and his family. Greg and Jenny had an all-but-sexual relationship a long time ago, and she has often wondered what it would have been like to have gone all the way with him. It turns out that he's still wonderfully handsome, and she discovers he has had the same prurient thoughts about her. So while everyone else is busy, they consummate their long unfulfilled relationship.
Many other authors would simply present this as hot sex. This author, however, assumes that her protagonist has a conscience. That is, she thinks that maybe she shouldn't run the risk of ruining a good relationship with her husband. Sometimes the insertion of the moral dilemma makes the sex hotter, but that wasn't the case this time - at least not for me. There's some irony here, because in real life I favor conscience and monogamy. I like stories that are realistic, and the conscience factor is realistic. I think the proble m is that the author goes halfway: the protagonist brings up the idea of conscience and fidelity, but the author doesn't really follow up on it effectively. Or maybe the problem is that the author is being a little TOO autobiographical, trying to retain too many exact details at the expense of plot development. After reading a lot of hot sex, I would expect to feel sexy, but in this case I felt sad.
Having said what I said in the preceding paragraph, I should add that the "flaw" is not cataclysmic. This is still a pretty good story with high ratings. Maybe if I had read all the other stories in the series I would see things differently. Maybe if I were reading the whole series as a case study, I would find this to be a fascinating personal history. But I was looking for a self-contained sex story, and this one just slightly missed the mark.