Literally the only differences were a single word like "caretaker" instead of "mom" and "roommate" instead of "sister". There wasn't anything that didn't make sense. The game was fine and enjoyable. All I'm asking is if there's a way to revert the incest like previous chapters had. Simple as that. I'm not knocking you for liking having sex with your mother or sister. I'm just saying it's not for me.
No offense but as you said it's literally just a difference of a few words so if you got by with 'caretaker' and 'roommate' before you should really be able to get by with 'mom' and 'sister', the story is the exact same regardless of the 'taboo', and tbh 'caretaker' and 'roommate' are just as weird in this context because it's at least heavily implied, if not outright stated, that Ophelia is his guardian and has raised him from birth.
If it's really that much of an issue I'm sure you can probably open the patch in notepad++ or another software and find and replace the words without it screwing the game up too much, some of the dialogue may make even less sense though.