I have to say....I'd go with OT's statement. And say it early enough so that she can think about it all day. Look good and smell good, and for this time...GIVE......if she asks for more then you can always give more....but, focus on the GIVING and the cherishing of her as a woman. Look at her, and touch her with new eyes and hands.
She may feel like she should resist verbally...that's what she is use to now, but it doesn't mean she doesn't want it. Get her in the mood and expect it to be all about her, and ENJOY it being all about her.