Every night I would go to mom's window or bedroom door to spy on her. Sometimes she would just go straight to sleep, or sit up and read for a while before going to sleep. Most nights however, I could usually catch mom playing with her pussy. I usually watched her from outside her window so it was less likely she would catch me. On the nights that I was very horny though, I would stand at her door, watching and listening to my mother pleasuring herself. I would jerk myself off while watching her, and spray my cum on her door and floor, not bothering to clean it up.
I was becoming obsessed with making myself cum as I watched mom orgasm herself. I always imagined my cum splattering on her fat body. I got a rush from leaving my cum on her bedroom door or floor thinking that she might touch it or step in it. I got such a thrill thinking about my cum touching her.
One night I crept into her hallway to see what she was up to. I could see that her bedroom light was off but the glow coming from her room told me the TV was still on. As I got to her door I saw that she was lying on her stomach fast asleep. Her covers were off and her pajama bottoms had ridden up one legs and exposed her thick calf. I already had my cock pulled out of my shorts and at the sight of mom's soft skin I instantly got hard. I ever so quietly crept into her room to get a closer look.
As I approached her bed I saw that her top was also pulled up some and the side of her fat belly was exposed and so was the bottom of her big tit. I grabbed my cock at the sight of this and began stroking. I moved closer to her bed and my cock was inches from her bare foot as I jerked myself off staring at my sleeping mother. I got close to cumming several times but backed off each time. I wanted to take my time jerking off to my partly exposed mother.
I had my cock almost touching mom's foot at one point and decided to push it and see how far I could go. There was a drip of precum on the tip of my cock and I very gently touched mom's foot with it. I slid it over her sole very gently, smearing my precum onto her foot. This was turning me on so much I was having a hard time controlling myself from cumming. I moved around the corner of the bed a bit so I was closer to mother's legs. More precum had built up and I softly ran my cock head over her calf, leaving a shiny trail of precum on her skin.
At the same time I was doing this I was closely paying attention to mom's breathing. If it changed any I would have to make a break for the hallway. So far though it was steady and I kept jerking off over mom. I had walked around to the head of the bed where mom's head was and was stroking my cock inches from her face now. Images of my cum splashing across her faces were going through my head. I had my cock so close to her face now, I could feel her warm breath on it. This was putting me over the edge and I almost threw caution to the wind and was going to just cum right on her face but then thought better of it.
I went back to the foot of her bed and as my cock started twitching and spasming I aimed it down at her floor. I wasn't quite fast enough though, and a long stream of watery cum shot up and landed across mom's calf. My hips were jerking and bucking as the rest of my cum fell to her floor right at the edge of the bed. My eyes were glued to mom's face to see if she would wake up from the shot of hot fluid hitting her leg. She never moved, her breathing not changing.
As soon as the last of my cum dribbled out of my cock I scrambled back into the hallway and stopped. My whole body was shaking with excitement and nervousness at what I'd just done. I had shot my cum straight onto my mom's skin. I couldn't believe it, and couldn't believe she hadn't stirred or woken. From where I was standing now I could see a glistening on mom's calf where my cum lay. I was wondering if I should try to clean it up somehow when I saw mom stretch her leg and roll to the side. I ran across the house back to my room. I hadn't watched long enough to see if she'd gotten up or was just changing position.
I layed in bed, half expecting mom to come in asking me to explain what was on her leg but she never came. I fell asleep running the image of my cum landing on her leg over and over in my head.
The next morning I got up and went to the kitchen, where mom was making breakfast. She said good morning and asked how many eggs I wanted. Everything seemed normal so she must not have woken up or at least not noticed anything wet on her leg if she did. I was relieved.
We ate breakfast and I went to hang out with my friends while mom did some shopping. I got home a little after dark and found mom in the living room watching TV. I sat and we talked about our day for a bit and she said she was going to turn in for the night. I said goodnight and gave her a hug and went to my room.
I waited a few minutes and then made my way outside to mom's window. When I got there I saw that her light was on and she was at her mirror undressing. She had pulled her shirt off and was now taking her bra off. As she unclasped her bra, her heavy tits fell to her belly and she let the bra fall to the floor. She watched herself in the mirror as she rubbed under each breast, her skin red from the tight confines of the bra. As she was watching herself in the mirror her hands went from rubbing under her tits to caressing the front around her nipples. Her head fell to one side and eyes closed as she rubbed her nipples, occasionally pinching them and gently pulling.