How's this for pick-up line? "Excuse me; but by any chance would you happen to know the three major causes of the Civil War?" Alan is in a bar at a teacher's convention, and the question is coming from the young teacher's former history teacher, who had also been rated the third-best-looking teacher in the school.
They have dinner together and share fond memories of their former times together. An unanswered question is which was greater - the number of times she imagined her husband was Alan, or the times Alan had jerked off imagining it was Maureen's mouth wrapped around his cock instead of his own fingers. In the present story they make new memories.
This is vintage Ann Douglas stuff -" an older woman making gentle but passionate love to a younger man. Memories and experiences blend nicely into a very good story.