Well, he's attentive, loving, and good in bed. He has his qualities, even if nobody else ever notices them. That's why she stays with him.

"I dunno. She went out t'work about an hour ago. Can't stop business just because Sylvia 'n her cronies are rounding up every Midnight witch they can get their hands on." The frown on Cooper's face has nothing to do with Cesare right now. He's worried about Nancy being seen. Still, it might be better if she just acts as if business is the same as usual. That way she has nothing to hide. He's got enough influence that he's not so secretly put a vampire tail on her to report back if anything goes wrong.