I'm trying to find this fic I started reading years ago, but I looked all over the place and kind find it, i drives me crazy. In that fic, Lois was about to marry luthor, and in a desparate attempt to keep her away from him, Clark agreed to 'date' her as superman. I remember reading him sitting with his parents trying to explain what drove him to do this.
I'm almost positive I read it on Lcfanfic

Does it ring a bell to anyone?