We decided to spend a quiet evening watching fireworks from our apartment instead of going out this time because we both had work the next day. My wife and I snuggled on the deck with the neighbors deck within eyesight. As we cuddled I noticed that she was wearing only panties and a long shirt. This turned me on because I am an exhibitionist at heart and my wife is prim and proper. She started to rub her ass in my crotch and my cock stiffened. I got braver and reached around and rubbed her crotch through her panties. I could feel her getting wetter...