are there any games regarding this? i know of 2.
first a small village. mom has to look after kid who is bullying her son, they fuck. unfortunately its unfinished for now because of patreons attitudes towards this stuff theres 2 sex scenes for now

second is the prank war.a family move to a small island where mom is the teacher of her sons class. thers a bully who fucks mom also lots of others husbands coworkers farmers the whole island pretty much.  its alooooooot longer than the village and its finished the downside is it can take so long to get to some of the scenes and it can be a difficult without a guide.

personally id prefer the village if it was finished so if you like it encourage the author to finish it on somewhere other than patreon

1-No idea
2-Mischief War

https://ulmf.org/threads/rj189682-mischief-war.10571/
http://www.anime-sharing.com/forum/torrents-47/5-[rpg]-[%E9%B3%A5%E7%B1%A0]-%E3%82%A4%E3%82%BF%E3%82%BA%E3%83%A9%E6%88%A6%E4%BA%89%EF%BD%9E%E5%B0%8F%E3%81%95%E3%81%AA%E9%9B%A2%E5%B3%B6%E3%81%AE%E7%89%A9%E8%AA%9E%EF%BD%9E-ver-1-03-a-580612/

Here is a game with this subject.

The MC gets a spell book that can corrupt. It then does just that and you have a choice. You can choose the love/domination or the NTR story. You even get 2 versions of the NTR choices if you like. Tons of content so far and updates every month.

From what I have seen so far there is a lot of potential for mom/son NTR and more

http://adultgamescollector.com/2020/07/02/the-spellbook-new-version-0-10-0/