I'm pretty sure that this fic was rated MA anyways this is how the story goes:
Kagome lives togther with Kikyo and Inuyasha (they are very close)who are mated and soon to have a child.Kagome is quite free about her sex life and loves to experiment however due to some things that happened, she is feels a bit insecure.(Like hojo offering to give her a breast impants to make her breasts bigger). She also write a sex advice column in a newspaper.
Thanks very much for the help! I hope someone can find it