I'm glad you stayed strong.
I also think that not telling your wife about your thoughts on drinking yesterday is the correct decision. It sounds like she has enough on her plate already.
And even if she didn't, you don't need to vocalize every thought that comes into your head. I think that's a bad idea. As an analogy, if my wife and I went to the beach and I vocalized something like "look at all the pretty women here" I would be walking home. Alone.