Rewriting this again for berevity & clarity. Though this type of game isn't my cup of tea, I have no issue with NTR, I'm not intending to kink shame, & to keep things on topic, I'll leave my opinions on the quality of the game out of this.
My issue with the game is it is very heavy on child abuse. Now maybe that was completely unintentional on the dev's part, but by choosing the woman's son as the MC & as the person to be the "weak, wimpy beta" male to be cucked, abused & degraded, That makes it child abuse.
& before anyone says "excuse me, he's 18. He's an adult, therefore it isn't child abuse". Actually, yes it is. With how broken & lacking in any self worth & self esteem the MC is presented as, clearly the way she treats him in this game would logically be how she treated him as a child.
"Well ok, in trying to push the kink, maybe he accidentially went into territory that could be read as child abuse. So what? Why is it a big deal?" First of all, It couldn't be "potentially read as child abuse", it absolutely is child abuse. Her attitude & behavior towards her own child is beyond appalling, especially in contrast to what it SHOULD be. Secondly, why is it a big deal? Why does rule 7 ban any ** like content? Why does creating or possessing ** get you sent to prison when all other porn is completely legal? Why does, for most people, the thought of a man beating his child illicit so much more vitriol & anger than if he were to beat his wife? It's because almost all of society agrees DO NOT HARM CHILDREN.
So if I were to give the dev some constructive criticism, I'd say you're better off rewriting these as the MC observing his mother cucking his dad. By putting the MC as the cucked character, whether you intended to or not, you turned this into a child abuse kink piece.