My [31M] fiancé [30F] has asked me to whiten my broken smile before our wedding and I don’t know if I should.

Throwaway because my fiancé uses Dating.mobi.
I love my fiancé, let’s call her Lucy, she is beautiful, kind and intelligent - pretty much all I’ve ever wanted from a woman.
We have been together for 6 years, friends for 3 years before that. I couldn’t imagine spending my life with anyone else, so I proposed in January and she made me the happiest guy ever by saying yes.
But yesterday Lucy asked me if I could do just one “small†thing before the wedding, whiten my teeth.
You see, when I was a teenager I fell and hit my face on a curb, a couple of my front teeth were broken. My dentist managed to “save†them, in the sense that I still have my original teeth, but they no longer have nerves and darkened a fair bit afterwards.
I’m not going to lie and say that I love the fact that my teeth have darkened, for photos I tend to keep my mouth closed, but they have become a part of who I am now (16 years later) and I’ve always thought that if someone can’t accept me the way I am then screw them. But I love her, and I want to make her happy.
I should add that this is not new. Lucy has brought the subject up before and I’ve always point blank refused, I gave excuses about money or said that I couldn’t understand why she didn’t just accept it. It’s been a while since it was last brought up though.
And, as I said, we were friends before we got together and I knew her type always had dazzling smiles of pearly whites, and she has always prided herself on her own smile.
Lucy thinks it will do me good, that if I got it done then I’d like it and wonder why I hadn’t done it sooner. I probably would like it, but the procedure isn’t guaranteed to last and I may need to have it done again in a couple of years. And also I may hate it, I might feel like I’d given up on or lost something.
She hasn’t threatened to break up with me or anything like that, the wedding will still go on, but I can’t decide whether or not to do it. Our finances are better now and it’s a small drop in the ocean compared to wedding costs, but I still feel like she shouldn’t ask me to do this. I thought she’d get over it.
Am I just being stubborn? Or would I be giving up a fundamental part of myself?
TL;DR my fiancé has asked if I would whiten my teeth before the wedding, which are quite dark because of an accident in my teens, but I don’t know if I want to.


Source.

Whiten your damn teeth. Smh. It's no biggie

Hmm