Ignoble Bard, this piece is written with all your usual wonderful and elegant eroticism.
I did not know the prompt initially, and because I tend to place Sauron in Mordor at that time period, I thought this person was perhaps an emissary of his, given a certain power, like the Mouth.

The interaction between Haldir and Sauron was so heated, and so deep, beautifully written. It must be the story I would say fits best the saying, " Forbidden fruit is the sweetest. "