I believe your overthinking this stuff too much as far as how to react to your wife. Regardless of whether you reconcile or not, it is much more healthier for your D6 if she sees a positive relaxed interaction between you and your W. My advice is to just treat your W like you would a very good friend. If a friend of yours made you a pie wouldn't you tell them thank you and how good it tasted? Do the same with her. You don't have to be standoffish. If you see her at a joint function, say hello, ask her how she is doing. You can usually tell when the conversation has run it's course, so don't over extend it, but be polite and friendly. I know it can sometimes be a fine line, but for the most part just be yourself.
