Hestia does a Ibiki/Shikamaru scene in her story ANBU, We Have a Problem. She titles the chapters according to who is in them, so if you want you can just skip to those concerning Ibiki. They tend to be pretty D/s or BDSM centric, a little rough and really dirty, just to warn you!
http://naruto.adult-fanfiction.org/story.php?no=600095333
I haven't read any of her stuff, and some seems to be pretty BDSM, D/s as well, but they have an average rating of 5 stars. http://naruto.adult-fanfiction.org/authors.php?no=1296838726
Hope some of these work out,
-Alika613