I have questions!

hrm. so I have this porny ficlet (Summoning, ths Sam/Lee, Dark Magic AU). I wrote it for the sexytiems of it, and now it's kind of blossoming into this full story in my brain. however, the ficlet is basically the climax (hee, climax. Literally AND um, literarily.) all the rest of the story would be the set up and resolution after that ficlet, and feature a third party (Kara). SO. Wise flist:

Do I leave the ficlet as is, write a prequel and a sequel and then make them into a short trilogy?
Do I write one story incorporting the ficlet again?
Do I write the story and skim over the ficlet, referencing it in notes someplace?

What say you?