there is literally only one game that is like this that i know of but i hate it.
https://f95zone.to/threads/isolated-with-mom-v6-boraginol.104288/ game premise is amazing, mother and son stuck in the house and the mother pushes herself on her son so extremely to the point that it almost feels like horror. Problem, at least for me, is that regardless of how old you make yourself (you choose your age), the son is a 8 year old and it totally kills it at least for me. But hey, maybe you're one of the thousands of guy that can stomach that