Neighbors in compromising position, ackward situation!!!!,what now

I have known my neighbors now for the past two years, ever since I moved into the neighborhood. We became fast friends and even been over to their house a few times for drinks and cornmeal pudding. I know they are retired now and kids have either left or in colleges so I am they pegged as a good orthodox couple until last night. Now I am the kind of person once I turn in I usually don’t go back out and my policy is what stays in stays in and what’s out stays out. Last night though was an exception, I kept hearing some noises around the back of my house and with the recent spate of robberies happening in the area I went to check it out. Equipped with flashlight and machete, I ventured around and was probing the area between our common border .Now there is a slight growth of shrub,grass and small tress in that area to the back and is there that I turned my attention when I saw some rustling and strange noises. I approached cautiously as the noises got louder and became distinctly clear to be human voices, shun my flashlight over the thicket and got the shock of my life when I realized that it was my neighbor and they were in a compromising position. I was temporarily paralyzed as I was bracing myself for thieves not this .I didn’t know what to do and initially neither did they and the gravity of the situation dawned on them and embarrassment (wishing earth could take them in) turned to self protection and we muttered some excuses and bolted for our respective homes, them with clothes in hand (what they could find) and me with flashlight (my machete had dropped in the moment if shock) I suspect in the aftermath his wife must be giving him a tongue lashing of going ahead with what I am sure it was his idea, some kind of “trying to recapture his youth and spice up sex life” campaign .I haven’t seen them since morning,wonder how we will react when we both meet. Will I be able to keep a straight face or will my eyes be darting all over the place. Will we still have those enlightened conversations that we used to have and even if we talk, will there this unresolved strain on the conversation? I suspect I better forget about cornmeal pudding and drinks now or will we be able to get over that, after all we are all adults. Ever been in such a situation, and how did you cope?