Greek Wanking Adventures Pt 2 - Dad Caught Me Twice!

I must have wanked every single day after my brother taught me how to. It was a super pleasant experience that I would try to achieve every time I could. So my brother was not much into wanking with me again(even though it happened a dozen of times), and I had to find places to masturbate alone. Best solution was the bathroom, where I have shot most of my load in my life. It would be either in the shower, or on the toilet. I always used my mobile phone to surf free porn as I was jacking, except when I was pretty lucky and happened to be home alone, so I would use the pc.
It was one of those "lucky days" when my dad caught me for the first time. He said he was going shopping, mom was at my grandma's for a week, to help her prepare for my cousin's marriage, and my brother had gone to university about four months ago. I was 15 at the time.
Now, I think I should tell you some things about my dad. I never looked like him. He is tall, but a little bit chubby. He had a lot of hair on his large body. I had only once seen him totally nude, when I was about six and had my circumcision, because of phymosis, and my dad showed me had also been cut for the same reason. I remember how fat his flaccid penis seemed.
Onto the story now. My father left and now I'm home alone. I immediately opened the internet and started looking for a hot clip. I found one I had seen before but which I really liked. It was a big dick guy that was fucking his step sister. I got naked and started pumping right away. But just five minutes later, I hear the door open. I was shocked. I tried to get clothed but I was in a hurry so, when my dad entered the room, he saw the porn playing on the pc, and my wearing a pair of boxers, with a tent even visible to a blind man, and a half wore t-shirt. He burst out laughing, and said that he wasn't expecting that. I was almost dead from embarrassment. He told me it was ok, that the supermarket was closed, and that I should clean up as I finished. He also told me to erase my history after watching porn.