One of the most embarrassing moments of my life.
I discovered masturbating when I was younger but at the age of 14 I was well into puberty with hair growing in new places etc. At the time I was quick slim with my penis being 6'. And at this time my friend (Who turned out to have a 7.5' dick) had shown me porn on the Internet and from that day I've been watching it at least twice a week and jacking off regularly.
Anyway on to the story... I had an inset day off school and was home alone, my older brother was in Germany and my mum was at work and didn't finish until 5pm. So with my time I decided I'd get rid of some tension that had been building since I woke up. So I turned on my computer, opened a good video, pants around my ankles I started wanking to the video. After about 10 minutes I could feel the orgasm starting and decided I'd finish off in the bathroom downstairs. I turned off the computer went downstairs and stood next to the toilet while facing a large mirror on the wall I could see all of me in it.
So once again I pulled my trousers down this time to just underneath my balls and started to wank again in front of the mirror, about a minute later the feeling was too intense and I turned to the toilet to finish when I could hear the front door open and I could hear my mum's voice shout 'Hello!' She was home early! At that moment it was past the point of no return I released my grip from my penis but it was too late. I let out a high pitched hello as I cummed all over the toilet. I started to quickly tug my dick again to get the final drops out when the bathroom door opened. I turned my head to see my mum with a shocked expression on her face then laughed and left closing the door behind her.
I cleaned myself up hoping to myself she didn't get the full view as my right hand was holding my dick and my hair covered the area around my balls. I walked out into the kitchen to see my mum with a drink in her hand and saying to me 'I hope you didn't miss the toilet or get any over yourself' with a grin on her face and a faint laugh in her voice. After hearing this I knew that she knew what I was doing dropped my head and jogged upstairs and stayed there for the rest of the night.
Two days later I had to go down to my dads and have 'the talk'. It wasn't the best week I'd had in a long time...