Ideas
Me too! All of a sudden I'm seeing multiple taboo family romancing. (No mods; no cc) It is disturbing and destroying the previously healthy relationships. This was my fav family because of how they all were positive and supportive, helping the little ones.
When the option is there I used Relationship -- Let's just be friends but later they will become flirty again. Their romance bars were larger, I did the friend thing, but now the pink is back. I'll try to explain the pic.
Lily + Argus are married. Healthy relationship. They have a son. No cheat boundaries (default) & both have the toggle set to Disable Attraction to anyone they are not in a relationship with.
Lily + Javier is Lily's stepfather. He is married to Lily's father. Javier helped parent Lily from baby to teen and they all live together. Previously a healthy mentor and grandfather. Now, Sick and wrong romance.
Lily + Jasmine is Lily's half sister. Javier is her father and they share a mother. Again, they grew up together from babies. Sick and wrong romance. I moved Jasmine to another household to make it stop.
Other family romancing happening:
Argus (Lily's husband) flirting with his Father In Law - ughhh
Argus was flirting with Jasmine before I moved her out
Jasmine's Uncle visited and started flirting with her too before I moved her -- I did the friend thing and sent him home. Poor Jasmine, alone in exile because her family is suddenly falling apart.