Anyway, if you ever do read it, let me know what you think, good or ill.

But, of course! Your description of the arc of the story shows a vast reach. I knew you had used Autumn's Requiem as a springboard. How you are going to make Sam "ok" with this without making him seem a sap, only too happy to be a cuckold if it make Master happy, I will be happy to see. It all sounds like a more sophisticated tale than is usual, which have fewer complications, typically. It might be the nature of a long-running threesome to bring out the capacity of characters to make make the best of things, things that get messy, which happens a lot in real life.