That is not supposed to be Lois. It's Lupe.
The cover is by Gene Ha for Adventures of Superman #629 in which Lupe, who works in the Metropolis Special Crimes Unit, was visited by Superman when she was taking a bath and she tried to seduce him.
The weird thing though is that I have that issue and the tpb and both of them use a cover by Doug Mahnke instead. I guess Ha's cover was to risky and DC didn't want to use it or they used two covers for that issue for some reason.
EDIT: I found a solicitation for the issue that only credits Ha and uses his cover so I'm pretty sure DC changed their mind about using it and went for the Doug Mahnke one instead.