I'm not sure how to describe this one? If I said "A thief gets an excessive punishment" that might cover it? I guess it's classic Idris, in that it starts off happily enough and then goes nasty after that. It's not gruesome though, just unpleasant. You are right to argue the horror tag if you see fit. I wouldn't say that it classically fitted the genre. Enjoy :o)
Narrated by Obabscribbler who has written work on fimfiction as well https://m.youtube.com/watch?v=ms3E48eINdI
Available as one of the stories in the Lulu book 'Nightmare Nights'
http://www.lulu.com/shop/the-pony-print-project/nightmare-nights/hardcover/product-22875924.html