I probably wouldn't do it because when people ask what her plate means and then she will explain that it is referring to her $800 shoes. Also, if she doesn't care very much, then it won't be so special to her.
this is exactly why i started second guessing myself in the first place. i know my wife cares about it and is okay with it or else she wouldn't have agreed to have it on her car. i talked to her about it just now and she said people have been asking her what her license plate is going to be. her response: "it's going to be RED SOLE because of the red calipers. also, one of the definitions of the word SOLE is, 'being only one of the kind, unique,' which each mini cooper is in its own way. and because Jay's really into these shoes right now that has red soles."
i love how she threw that last part in there. it is my fault though.
it looks like she's got it covered. thanks again everyone for your input.