I intentionally broke many of the tips in the various writing guides that can be found here on Literotica. The most important of which is that "the purpose of all erotica is to arouse the reader to orgasm." I hope you do not have an orgasm. I hope you choose to bring yourself to the edge and then refrain from cumming when you read this.
---------------------
"Ahem! What do you think you're doing?" You see me standing there and try to cover your rock-hard prick. "No," I say, "no; don't try to cover up your shame. Stand up and tell me what is going on here."
Trembling, you reveal your angry boner. You blush with embarrassment, but you're also shaking with fear. You knew better. I had caught you before, and explained the rules. "Mom, I... I... Oh Mommy I'm sorry..."
"Don't tell me you're sorry. Tell me why you're breaking my rules! You're touching yourself in my house. You were trying to spill your nasty fluids in my room. And of all things, you're using MY panties! Just because you're 18 doesn't mean you can start breaking my rules..."
"Oh Mommy," you plead, "I can't help it. It gets so hard. It hurts and I want it to shoot the bad stuff so much." You're trying to wish your erection away, but seeing me in my short cutoffs and tiny T-shirt is keeping you as aroused as ever. "I need to shoot it, Mommy. My penis throbs and aches, and I feel like I'm gonna just die I need to shoot it so bad. Please let me do it just once in a while. Please, I get so horny."
I cock my head and look at you quizzically. "Horny, huh? Horny for what? Your own mother? Let's see how horny you are for your mommy." What happens next makes your heart pound with surprise as much as with excitement. I peel off my shirt, and since I wasn't wearing a bra for my quick trip to the store, I stand there topless before you. I grin as I watch your cock twitch when you lay your eyes on my breasts. I hear you swallow hard as I hook my thumbs into my shorts, pulling them off with my panties in a single swift stroke. Kicking my shorts and panties aside, I stand before you naked. You don't move or speak. You're lost... transfixed at the sight of your naked mother.
I slowly walk toward you, and drag a finger from your balls up the length of your needful shaft. Leaning in close, I whisper in your ear, "What makes you think I'm going to let you 'shoot it' even 'just once in a while'? Do you think you're a man? Do you think that you deserve to use your penis like a real man? Do you think that you deserve to cum like a real man?"
The pleasure of the first touch (other than your own) on your prick in your entire life is more amazing than you could have imagined. You think you might pass out with the sudden desire to melt into my finger, but you think you see a way out, so you struggle to keep your composure. "Yes, I am a man, MOTHER. I'm a man and I can jack it and shoot it whenever I want."
"Hrumph. Listen to the big man who has to use pet names like 'jack it' and 'shoot it' for the things that grown ups call masturbation and cum. Well, big man, let's see whether you're a man or not." To your amazement, I turn around, and bend over. I gently take your cock into my hand and guide it to the edge of the hole that could bring you so much badly needed relief. You know that I'd never allow you to have intercourse with me. I'd never consent to it, but the words that come out of my mouth next mesmerize you: "Just because you're 18 doesn't make you a 'man.' If you're such a man, then rape me like a real man would. Take your mother's unwilling cunt by force if you think you deserve to use your penis like a man."