Haven't tried Taboo but I can safely assume it would change the dialoge to show MC is related in some way to the ladies.
so taboo is incest, meanwhile the standard it just family friends knows each other
Basically yes, assuming they have used "taboo" in the right context. As I said, I haven't tried it myself as I'm not into that. Based on what I have seen so far it could likely be an Aunt and cousins or something down those lines.
i check it out, yup there cousin