What about saying to her:

Honey I've been thinking and I'm no longer going to "ask" permission to touch you. You are my wife. I love you and I love touching you. I promise I will be mindful and respectful of your moods and my timing but if I have the urge to touch you or kiss you, I'm gonna go for it. What do you think of that plan?

There is something really odd in the dynamics you described and I think taking back a little of your power would be a good place to start. Right now, it seems that your wife holds all the cards and neither of you really like the setup but aren't sure how to change it.

Glad to hear that you are no longer in pain. Hope the rest of the recovery goes smoothly.