I remembered this story was on FF.net.I can't remember everything,but Kagome gets captured and she is in a cave or something like that and Sesshomaru and Naraku are both present.Kagome makes some sort of comment like she is the mistress of pain (or something to that effect) and it strikes the interest of both Sesshomaru and Naraku.I think they ask her to explain and then at some point they begin to argue beuscasue Sesshomaru claims her as his mistress of pain and Naraku wants her as his mistress of pain.They then come to an agreement to share her,Naraku wants her only so she can be his dominant (is this the right term?) and Sesshomaru wants her in a relationship that has elements of this.They then give her money so she can go back to the future and purchase things for her (and their) use.I remember it being on FF.net if anyone remembers the title or author please let me know.Thanks guys.

I think the story you are looking for is "Copping A Feel" by Keva

inu.adultfanfiction.net/story.php?no=600093118

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 a hentai demon lord. Humor, M/F and extreme hentai behavior!

There are 8 Chapters, and it is incomplete.

It is also on FF

www.fanfiction.net/s/4724515/1/Copping_A_Feel

THAT'S IT!!!I have been looking for that story for ages.Thanks a million billion times.