Don't know why the tag is there but you can change how the MC adresses the characters in the game for example: Nancy (the blond milf) is default named as a Babysitter, you can change that to Mom or Mother, the MC will call her by that.
I mean if you don't have balls and afraid that you gonna be banned because of incest game then why do this BS "Landlady and roomate instead of mom and sister" and not just make a game without it ?