This is an older fic by Keva aka Naraku's Unseen Mistress aka Keva's Back. She started it a while ago and never finished it, but has recently picked it up again. It's a very funny read and I highly recommend it. Especially now that she's decided to pick it up again!
Title: Copping a Feel
Summary: Sess has an uncharacteristic compulsion, Inu is PMSing, Muso is on the loose, Naraku is a perv, and Kagome is going to kill them all… Starting with one hentai demon lord. Humor, M/F and extreme hentai behavior!
Rating: Mature
Link:
www.fanfiction.net/s/4724515/1/Copping_A_Feel