here's what you do. take her shopping. let her pick out any dress she wants, nice shoes (italian, leather, $$ no object), then stop by the jewlery counter. "which do you think would go better with your new outfit??".
then when you get to the register look at her fondly shrug your shoulders and say "you know, I'm just not in the mood anymore. put it all back."
we can change our mind too.