For me it actually started with my cousin, she was a very very hot girl(she actually married to a very rich guy way older then her, which can give you a notion of what type of hot she is), and all the guys at my soccer team would get all worked up when she came watch the games. One of these guys was super popular with the girls and even at age 13 he was waaaay ahead of us in that subject. Not that the guy was ever mean to me, actually we were good buddies, but he will constantly tell me how hot my cousin was and if I thought she would like it if he showed her his dick.

At first it was annoying but for some reason one day while I was gonna masturbate his comments came to mind and I imagined him with my cousin and needless to say I came very quick.

Then it was that for some time, until a year later, my mom came to school to visit, and one of my male teachers was talking to her for a long time, and after she left he told me that I had a beautiful mom and I was lucky. Then it all came back like a tsunami but instead of my cousin it was my mom.

What got me to the point of no return was in high school, we were teasing a guy about his mom, and he tried to deflect bringing my mom into the conversation. When he said that my mom looked like a softcore pornstar, the fact that he was the only friend at high school that had been to my house and seen my mom, gave a lot of credit to his statement and then all the guys started asking about her and wanted to see pictures of her.

Of course I acted pissed off, but I am grateful that I could control my boner thinking about other stuff, because I had a hard time fending off the thoughts of some of these guys getting their paws on my mom.

I must have masturbated to that though everyday for months, and then I just accepted the fact that I was deep into this fantasy.