On that note:
I edited the tags in the script file myself. Hannah is referred to informally as Sis, Jennifer as Mom, Karen as Aunt Karen. If you notice anything not working, let me know.
Just unzip the folder and put it's contents into the game folder. Say yes to Replace File.
Edit:
Second go at the file, Ashley and Seline refer to each other as Sisters and Maya as Mother or Mom, the MCname coding issues have been solved, and most of the instances of any family relations not being named seems to be gone as well. I'll probably play through the whole game again just to be sure, but hopefully this solves everyone's issues. As an added bonus I changed "Hammer"'s name color because lets face it, that was just too damn dark.
R3kT You should probably use this as the Incest Patch instead of the one marked in the OP since that one doesn't function. Also check how I changed the MC to a DynamicCharacter and got rid of the Brackets and it solved everything.