Sounds like you are on the right track. I would recommend that you do not drop your guard to easily.
What you need to do is continue with your 180's, do the opposite of what you would normally do. If your wife expects you to be logical all the time, be spontaneous. maybe at one of your dinners, suggest something completely off the wall for you to do.
Any positive interaction is good interaction. If she enjoys these diners etc. then make sure you are enjoying them as well.
The biggest thing for you to do is GAL! Get out there, maybe join a fathers and babies class. There are all kinds of those and you will meet lots of new people. Focus all of your time on your son and enjoy these moments with him. Let her see what a good father you are.
