Hmm, that sounds a little dangerous, I was gonna say something similar-ish, though:
Specifically, I think there may be a male/ female divide on attractiveness here. Males are usually more visually oriented -- "you look hot"/ "you don't look hot." Females are often (not always! but I'm going from what you say here) more behavior oriented. "Oooh, you have been complimenting me and winking at me and took me out to dinner and made me laugh -- you're hot!"
As in, if you haven't been doing some sort of wooing/ date sort of thing, I'd suggest doing so -- make her feel wanted, see where that gets you. You may have to do it a few times so she doesn't feel like it's just that you want to get in her pants (though of course you do

); it could backfire big time if you do it once, she doesn't want to, and then you get all sulky and stop trying.
That's all in terms of what you can maybe do to help alleviate the situation -- I don't want to imply that it's your fault, at all, since I completely agree that it's plain not fair for her to try to cut out sex entirely and expect you to live with that. Just, you can only control your own behavior.
How does SHE feel about how she looks? For a lot of women, feeling desirable has a lot to do with feeling desire.
Sorry you're in such a difficult position. I'd suggest getting your daughter out of the way somehow (baby sitter, family member, whatever), and going on a few proper dates with your wife, just the two of you, and seeing if that helps anything. If it doesn't (and it would require some time, the dates themselves and also the more general attitude around them), I'd suggest counselling -- could always start with that, too.
Good luck.