True story:
When I was 11 years old, I developed a huge crush on my Mom. She was in her late 20's then and still hot. In fact, my bedroom overlooked our back patio, where I would often spy on her sun bathing. My mom was the girl in the neighborhood all the women secretly hated and all the guys wanted to fuck. She loved to flirt. And I loved to watch her tease other men in front of my dad. By this time, I was starting to realize that my dad secretly enjoyed it too.
One day, I found some nude pictures of my mom in my dad's porn collection. For months I would by-pass the Playboys and Penthouses and dig for her photos to jerk-off to. God I had such overwhelming guilt afterwards, but some of the most intense orgasms. I would masturbate to her photos hours at a time thinking about her fucking other guys in front of my dad.
One time though, I left a picture of her underneath my bed and she found it. She didn't get angry or even say anything about it. I spent weeks wondering and dreading this confrontation. Instead she just invited me into her bedroom one morning while she was getting dressed. My dad had already left for work. She didn't say anything, she just kept trying on different bras and panties. Taking them on and off. After a while she pretended not to even notice me on the bed. I had slipped down under the covers so I could masturbate without being detected. I was too embarrassed to cum, so I got up and ran into my room to finish. I could hear my mom giggling to herself as I ran out.
A couple years later when I was thirteen, mom sat me down for a talk. By that time, my dad had moved into the guest bedroom and mommy was bringing guys home from work and fucking them. She tried to explain it all to me so that I wouldn't "be confused" about what was going on. Our conversation went on for hours and I waited until she really loosened up after several drinks. I asked her if she'd take her cloths off for me again. She thought and said "Well, daddy's away so just for tonight we can do anything we want."
We walked up to her bedroom and this time she removed her cloths and got on the bed next to me. We started with a no touching rule but after several attempts I got to caress her tits. That's when she confessed that when I was a baby she used to change my diapers in the nude. She said that she thought it was cute because "my little pee pee got hard." I too then made a confession. I told her about how I liked to masturbate while listening to her have sex. She threw her arms around me. I could feel my cock pressed against my mom's pussy hair. I kept trying to stick it in her pussy. She stared laughing and pushed me away. "That's naughty." she playfully scolded.
Finally she relented and told me that I could just stick it inside her for a second. Her soft, caring hands guided my cock into her pussy, and it was better than I imagined. We both just giggled and laughed. A rush of shame and euphoria came over me as I looked into her eyes and down at her gorgeous tits. I couldn't take it any longer. I started pumping my dick inside her. "No", she said again, playfully scolding me. "That's naughty. You can't fuck mommy." After a few seconds her mock anger turned into soft moans. It didn't take long for me to shoot a load, but just before I did, I looked over to the edge of the bed and imagined my dad, sitting there watching us and jerking off.