The fact that bella and edward waited until they were married and were prepared for it not to be great are both good things to teach her - real love waits and doesn't feel pressure to do something they're not ready for.
I understand what kristie is saying and never really thought about it before - but honestly I'd rather kids learn about sex through books rather than from their schoolmates or television.
Good points, celerystalker (love that screen name!) And we do want our girls to know that sex in marriage is a wonderful thing. I would assume with OP's convictions about how to raise dd, there is probably precious little tv watching these days.
OP - if your beliefs are Christian-based, there is a fabulous book you could have your dd read, maybe as a condition of reading the one she wants. It is called Facing the Facts: The Truth about Sex and You. It's the 4th book in the God's Design for Sex series, and is geared to tweens. Among other things, it deals with messages about sex our kids may get from friends and the media. Straightforward, not embarassing to read, and full of much useful information. It is Christian, but not of the head-in-the-sand variety.
If you feel like she's really not ready to talk about it, the 3rd book, geared for ages 8-11, is a little less blunt (not much less, though) and called What's The Big Deal?