I wouldn't bring it up with her. I think you handled it brilliantly and broke the ice. I'd leave it alone.
I don't buy into your wife's R paradigm. No real suggestions on that, since she has rejected marriage counseling, which is my first suggestion. Hopefully someone else has an idea.
Me: 44 H: 44 Kids: 20, 16, 16, and 10 Together/Married: 22 years H announced he was emotionally detached and considering D: 4/4/16 H announced he is going to try to stay and reconnect: 5/1/16