Brother, my story isn't a lot different. Sounds like my wife is similar to yours in oh so many ways. I had to teach her the biker bit though, so at least I brought something to the relationship.
My wife had a horrible auto accident in the year 2000, and has been a cripple ever since. Sex? That aspect of our marriage is no longer possible.
For the first time in my life, I was forced to love someone without any possible return. It changed my life forever.
I matured as a husband because of the auto accident. Because of this, my own personal belief in a God has been confirmed.
Go figure