This is an one-part story. Each one can use his or her imagination about what comes next.
I apologize in advance for my English, which is not perfect. It is not my mother language.
*****
It was another usual day and I was into my usual business. I was in the bathroom, masturbating while sniffing my mother's panties. My cock was very hard and my eyes closed. I was enjoying the scent of her cunt and dreaming that I was licking it. Suddenly the door opens and she comes in. At first she didn't realise that I was in there. When she saw me her eyes opened wide and she run away screaming how sorry she was. I didn't really bother. This was not the first time that she got me in this position. I kept on jerking off until my balls emptied, I cleaned myself and I went to my room. I went back to my work. I was selling things through internet. It's a job that my mother didn't consider "proper" but which gave us enough money, in order to have a decent life. Since the day my father had left us, I was the one who was bringing money to our house. My mother has always been a housewife. She was perfect in her duties but they didn't give us any money at all.
At some point she came to my room.
"Son I need to talk to you!"
"Tell me mom. I'm all ears."
"Son this can't go on anymore!"
"What do you mean mom?"
"You can't keep on jerking off while you sniff my panties!"
"Which part exactly is bothering you? The fact that I jerk off or the fact that I sniff your panties?"
"Well...as a grown up man you can jerk off, if you wish. Of course I wouldn't like that to happen either but I understand it. The fact that you sniff my panties though is very embarrassing."
"So is the fact that you come in the bathroom without knocking first. Have I ever been doing that?"
"No, you haven't"
"Imagine me doing it. How would you like that? While you take a shower for example or while you piss, or perhaps while you masturbate."
She got completely red and put her head down.
"I...I don't masturbate..." she said, but her face had turned completely red.
"That is not the point here! The question is: would you like me to act that way?"
"No, son!" she admitted in a very low voice. "It was going to be very embarrassing."
"You see? You keep on doing it though, even though I have told you many times not to."
"But there was no sound coming from the bathroom!" she tried to defend herself.
"Sorry mom! Next time when I am in there, I'll start moaning and shouting how much I love your pussy odour, so that you know I'm in and you knock first."
She got again very red and left the room.
I started to laugh. In fact I really enjoyed that kind of game. I was trying to make her open herself and admit that she liked to watch me. Because I was sure that this was the truth: my mother loved the fact that I was jerking off while dreaming of her. When my father left us, three years ago, he told her that it was her fault. She had neglected herself and became fat and ugly. Unfortunately I must admit that he was right. Comparing my mother's outlook nowadays with that, ten years ago, she has changed a lot. Nevertheless that is only half of the truth. The other half is that my father had found a woman in my age, fresh and sexy and he left us for her.
My poor mother was devastated. Myself, on the other hand, I was happy. Since my childhood I was fond of her and now that my main obstacle had gone, I had the chance to claim her for myself. I decided that I was going to be the man in the house. I would prove her that she could count on me and make her love me, not only as a son, but also as a lover. I tried to think of a job that was going to give me good money, without being out of the house for long. In the end it was exactly this one: salesman through internet. It took me for a while of course to learn the job, but two years later I was already making our living.
This gave me another great advantage: my mother was completely depended on me now. Without a job and without anyone else to whom she could possibly go and ask shelter, she was forced to stay with me, whether she liked it or not. I'm not an oppressor neither treat her in a bad way. But I was going to make it clear to her that I liked her and I wanted to be her lover, no matter what.
I started to do things that seemed a bit strange to her. I was going out of the bathroom naked, after taking a shower. I was jerking off in my bedroom while telling things like: "Oh yes mom, suck my cock" or "I love your tits so much mom. May I suck them?" Then I started to sniff her panties. I knew that she was aware of all these and I was expecting the day when she would talk to me, but this day hadn't come till now. In my mind I was wondering why? Was she afraid? Did she believe that she was going to infuriate me by saying anything about all these? Was she afraid that I was going to kick her out of the house? Did she prefer to pretend that she hadn't noticed anything? Or did she really enjoy all this game?
I was suspecting the last one, but I couldn't be sure. I knew a few things though. I had seen her spying me while I was jerking off, on my bed. There is a mirror, put in a "strategic" way, in order to point my room's door. I saw her watching me because I kept my eyes closed but not completely. Then she was coming in the bathroom every time when I was in there and I didn't make any noises. She knew that I was jerking off and she wanted to see if I was using her panties to get "inspiration". One more thing was that I always found her used panties in the laundry basket. If she really felt annoyed or embarrassed, she could keep them in her closet and put them straight to the washing machine. But the most important thing was that I knew my mother well. She couldn't fool me. She was a hot woman, craving for cock. I knew that she was masturbating too. In fact I knew that she had a couple of vibrators that she used often. VERY often as a matter of fact. Her bedroom was next to mine, so I had heard her playing with her toys, while she thought that I was sleeping. One night I thought that I heard her saying "fuck me son". Maybe she did, maybe I just heard what I wanted to hear.
The next day my mother was cleaning the house and she asked me if she could clean my room. I told her that sure she could, as long as I didn't have to go out. I decided to try something. I went to a porno site in which everyday men were sending naked photos of wife or girlfriend. It didn't take long before I got my mother's attention. She wasn't shocked at all. Instead she asked:
"What is this all about son?"
"A porno site. Any man can send photos of ordinary women."
"Do you mean that men send photos of wives?" she asked really impressed.
I started to laugh.
"Yes mom! What is so strange about that? Wives, girlfriends, friends, mothers, sisters, aunts, cousins...whatever! A guy has sent photos of his grandmother."
"Stop joking now!"
"I'm not joking. Wait!"
I searched for a while and found it.
"Here! What does the title say?" I asked her
"My grandmother!!" my mother said astonished.
I started to check the photos. The guy had contributed quite many. At first there was the naked body of an old woman, probably at her 70's, from back. Then from front. Even her face was showed. She was smiling. My mother looked completely stunned. Then there was a young guy also naked next to her. In the next one she was giving him a blowjob and then he was licking her cunt. In the rest they were fucking. My mother was shocked.
"How can they do such a thing? How dare they do it?" she asked me.
"Which part do you mean?"
"Everything! How dare she show her naked body and then her face and then her grandson?! This is insane!"