Apparently Lucifer "eats too loud" and keeps her awake at night.

::laughs:: Oh, my god, the crunching, the terrible, terrible crunching of his hideous jaws! Aieeeee!

That's what happens when you name your cat after a demon. I'm just sayin' - it starts out innocently enough, but pretty soon, he's nipping to hell for a late-night snack of damned souls, and you know, unless he crunches 'em head first, it's all moan, moan, moan. ;)