In Substitute, we have the story of a married man that is left alone with his sister-in-law one night, after having gone without sex for over a month. He's aroused. She's frisky. And sparks fly.
The sex in this story was quite hot while still having a humorous bent to it. In other words, typical Losgud.
The story plot itself is great. Told from his point of view, it leads you from the point that he and his wife rescue his mother-in-law from his sister-in-law, to where the wife picks him back up the next morning. Along the way, we are treated to his inner musings. Internal monologues are another Losgud speciality.
Technically, the story was very well written, but there were a few cosmetic problems. For some reason, there were a few paragraphs that began with a ">" in front of them.
I really enjoyed this story. The sex is hot, the humor content is subtly fun, and the story itself is just off the wall enough to be entertaining while still feeling believable.
I really recommend this story.