I was 16 when I caught my cousin Mike masturbating in the bathroom. He had forgotten to lock the door, caught him sitting on the toilette with his pants and underwear below his knees and his erect dick sticking up. Clearly got a good look at it as he stood up to pull his pants back up. Don't know witch one of us was more embarrassed; him getting caught with his hand wrapped around his dick or me for having seen it. I realized he was horribly embarrassed and scared about me spilling the beans on him. Told my girlfriend Stacy and she did nothing but laugh and ask me if his dick was big or small. Told her he was scared of me telling other girls or his Mom about it. Stacy, being a completely shameless girl, quickly realized we could blackmail him into doing it in front of us. They idea clearly shocked me but also aroused me. In fact she said we could make him do it before his Mom came home from work. "Look his 14 years old, embarrassed and the last thing he wanted is everyone finding out" It was Stacy that confronted him on his way back from school. Mike was stunned when she told him what he had to do to keep our mouth shout. The sheer embarrassment of the whole school calling him a wanker made him walk down with us into the back yard laundry room of his house. Down into the laundry room he went with two sex crazed girls dying for a thrill. Mike thought he just had to pull it out and turned purple when Stacy told him he had to strip bare naked. I wrestled with the thought of undressing in front of us and made us promise we wouldn't tell anyone. He ended up naked wanking his dick and embarrassingly ejaculating in front of us. Went home that day with soaked panties and ended up doing the same thing in my room behind a locked door. Mind blowing orgasm and sure Stacy was doing the same thing in her home. Can't even begin what was going through Mike's mind, but probably realizing it wasn't the last time he would hear from us.