Someone that does these paid commissions is rainbowtouch. They are active on reddit and hentai foundry. They wrote Mother And Vice, it's pretty good: https://www.hentai-foundry.com/stories/user/rainbowtouch/36637/Mother-and-Vice

Contact them they will write an awesome story for you.

Thank you very much for your answer, i'll contact him at once!

Hello everyone!
I am looking for someone (possibly a confirmed writer) who could accept a commission for an erotic story about of a fragile and wimpy arab teenager with small cock who sees his arabian MILF mother get fucked, and then impregnated by his white best friend. I hope there will be someone here who will want to accept this work, which of course will be paid!

Here's a quick synopsis:
A mega curvy arabian babe confesses to her son that she is sexually frustrated by her sexually impotent husband (his father), and is looking for a lover. Since she and her son have always been very close, she asks him to find her a powerful and dominant lover.

The son is very disturbed by this news. In parallel, he helps a little white boy of his class who is bullied, and becomes his best friend.
In the locker room, the son realizes that the white boy is very hung, and since it is his best friend, and he has done him a favor, he asks him if he wants to satisfy the desires of his mother, thinking that his new best friend is nice enough not to take advantage of the situation.
The white boy accepts eagerly, being a virgin, but things quickly turn to hell ... Because the little white boy, who were bullied all his life, finds the way to release all his frustration, and starts to bully the son.
He totally hatefuck the arab mother who had 15 orgasms per sex session, and who is very satisfied with the dominant side of her new lover. The white boy get his revenge of his social outcast life on the innocent arab son and his mother, making him do his homework, threatens him by saying that he will impregnate the mother, etc ...
To the delight of the mother, and who is very sexually satisfied...
When will this end?


Details of the writing:
You have to focus on the mother thick and curvy physique, with her huge breasts and wide hips (it's even better you describe how her breasts and ass flutters with each of her step). Even when the mother betray her son, she must not be mean to him, she must stay very sweet.
If she betrays him with his bully, it's only because she's sexually frustrated. She can not do anything to help it, the bully attracts her too much, he awakens her huge sexual instinct. She apologizes to her son every time she gets fucked, promises it is the last time, but can not help but succumb soon after. Of course, her husband is as wimpy as his son, unable to satisfy the enormous sexual appetite of his wife, and unlike his son, he must never realize that his wife is cheating.
There must be a scene where the bully slips into the bedroom, and impregnates the mother while her husband is sleeping next to him, under the eyes of the son who was attracted by the sounds of crackling of the bed.
As for the bully, he must be white, Caucasian, and proud to be.
The family, including the wimpy teenager, the MILF and the ignorant father must be from the middle-east. I would like some brutal raceplay here (the whites are the superior race, the arabs have small cocks and its unable to satisfy their females, that kind of stuff)
The bully must have an absolutely huge cock, with a lot of description on it. In the sex scene, do not hesitate to emphasize his huge size in the little pussy of the mother, the fact that he crosses the cervix and he fucks the uterus. (But without hurting the mother)
Regarding the sex itself, I do not like the preliminaries. If possible avoid cunnilingus and others, (oral sex at the limit) and concentrate on the fucking itself. Regarding the sex position, I love missionary, especially the mating press (it is related to my impreg kink)
The only thing I like outside of sex are sloppy kisses, with tongue and everything. It must be a symbol of the betrayal of the mother, especially when she kisses the bully in front of her son.
 To know that the mother will never be nasty or contemptuous towards the son. It's just that the bully is an ultra-hung white male alpha, who gives her incredible orgasms, and she can not do without him.
   
I would like that there is only one sexual position: the missionary mating press

Finally, it is necessary that the "impregnation" is very marked. The bully wants to give a white baby to the MILF (a bit of raceplay here would not be too much).
The wimp in question should not be excited to see his mother get screwed, but horrified. (really important)

The text must be written either in the first person, through the eyes of the fragile teenager.
 
Do not hesitate to contact me for more details, or to communicate me the price.
Thank you very much, and good luck!