Can anyone help me find a certain story?
 

A long time ago I read a series of stories about a girl making a bet with a guy who she can not stand. During the course of the story he humiliates her in front of their mutual friends, at a sex toy store, then I think in front of her father. About half way through the series the reader can choose for her to "turn the tables" and then she humiliates him (never read those bits). I think the bet was she had to pretend she liked him, it was more about her pride than anything else.I thought it was on Literotica, but I just can't find it...any ideas?