I wonder of the thoughts and emotions that will be going through your H's mind over the next week. Today he was curious. What will he be like tomorrow. Revengeful. Angry. Sad. Probably a bit of all.
The first thing you need to do is cancel any more horizontal dance sessions with your buddy.
I think you have now opened pandora's box. Your H will probably think that since you got some extramarital enjoyment, that he now is entitled to some lessons for himself.
Who knows, maybe this is the formula that was needed to rekindle your R. I still dont think it is right.