I believe it's season 6. Definitely not AU. I thought the authors name started with an S but when I tried searching I couldn't find it. I think the rest of the fics she had were all BDSM and this was the only one that wasn't.

Thanks guys!

I think you might be looking for Naughty Girl by Sandara, although she describes it as playful BDSM rather than none. It is set in a fictional season six. Her fics are on the do not exchange list though.

ScoobyDawn
Thanks ScoobyDawn! I'm pretty sure that's it. Do you know of any way I can read it? I don't think it's posted here anymore

No, she took all her stories down and is quite serious about not sharing them so we can't send a copy to you. Sorry.

SMac
That's o.k. Thanks for your help and Happy New Year!

Her "published" penname is Jolynn Raymond. I'm pretty sure she released this story in as part of a collection of things that used to be here, but with the character names changed. The title of the collection might be "Sweet Agony", but I'm not positive. Her stuff is available from Amazon, etc.