This story is so good that it actually got me to create an account on literotica and this site.
Really hope there is a prequel or sequel or another story with similar darkness.
The only thing I would hope for is in addition to the blatant open and direct humiliation to also have secretive bullying. One that I'm always looking for is the mother secretly having the bully cum in his food or drink but never telling the son. Things that the son never learns about but is being done to him that gets the mom off by doing it to him.
Of course the mother always having some reluctance in doing it but can't control her body's response.

I just wanted to mention something clever and very sexy in the story.

It's when Lennard is trying to decide on a dress for his mother, and she tells him: "Well, you know what? Too bad for him, because my baby boy gets to decide today! That'll show him who's the most important to me, won't it?"

Not only is she calling him her baby boy, but saying that his choice will show Jake who is most important to her is left open. Lennard will think it's him, of course. He's her son, after all. But she's really saying that Jake will see that he, Jake, is most important to her, more important than her own son.

A very very nice little gem in a truly excellent story.

Edited to explain: This hot little detail is only in the Literotica posting. In the version posted here Lennard is most important.