I found this author by following a random story in the archive. It was a different one than this but he has 62 stories with wildly different scores, from over eight to close to four. Exploring these stories could be rewarding.
This one appealed to me as a seven, good but not very good. Its mostly stroke, with some supporting story as framework to explain adding new men and women for the wife to enjoy, and the husband to enjoy vicariously. The primary motivation for the story is the husband's dissatisfaction with his sex life with his wife. Once a week becomes several times a day at the end. There is a little light domination and submission to explain why the wife and neighbor's wife are willing to follow the husbands instructions.
The technical quality is not bad, but occasional howlers like jester for gesture are why I picked seven. The plot also is a seven, its pretty much straight ahead stroke with some introspection with the husband worrying about how the wife and neighbor's wife will feel about what happened and if they will want to continue. If it were average, scores would be sixes. If you want a reasonable stroke story give this one a try.