When posted, I will reveal more...
My first experience being caught masterbating was on a trip to see my older brother in Florida. We always knew he had great porn, and there was an unspoken rule that we would always knock first before entering. (I had seen my brother in many auto-fellatio positions over the years-but more on him later).
He and his girlfriend had left for a few hours, and I went about my pleasure. I closed the blinds, and put the tape in. I had so much fun; being in Florida, and was really into my cycle.
By now my cock was nearing it's personal end, and for some reason; I saw the vertical blinds were closed except for one. As I was shooting sperm all over myself, I saw a girl's eyes: smiling and making the 'thumbs up' gesture. I was shocked.
This was my first time being caught jerking off, and I was scared silly. I cleaned up and nervously went to the door and looked out, but no one was there. My brother and his girl (now wife) came home, and I whispered to him what had happened; thinking his girl had seen me. He said they had just now come home.
I returned back north, and four days later he called me to say that his neighbor had 'seen' him jacking off. I look very much like Bobby, and he played the whole thing off like it never happened (To the girl-and not mentioning me).
The next day, she came over unexpectantly and asked him to 'give' her the show again. Once he complied, she realized the truth. She saw that he was circumsized; although the guy she saw uncut.
I am uncut, but my brother is not. Bobby finally told her what had happened, but she was either intrigued by us; or in doubt. She proposed 'an inquiry', and the next time I arrived, the three of us had a liberating release.
She actually greased the wheel, sliding her bottoms off before the top. As she coaxed us on-while pleasuring herself, my brother and I stood at attention. Her pussy was shaved clean and beautiful.
This one event made me realize that I liked exhibitionism, and; daringly... I have more stories to tell.