I only read page 1 of this post, and I think your wife is 100% wrong. My husband lost his wedding ring in the ocean, and I didn't even care if he got a knew one. He quickly replaced it because he wanted to, but it didn't bother me at all when he didn't have a ring to wear. My dad never even had a wedding ring, and he was always faithful to my mom, so to me a wedding ring isn't a bid deal.
I think that there is something wrong with your wife. You need to figure out what sort of underlying issues she may have.
The only way I could agree with your wife, is if you had cheated on her previously or previously gave some sort of indication that you had been unfaithful.