Please use this thread going forward: Romantic Relationships among close family members | EA Forums - 4954639
If you can't or don't use mods, you can use the Friendly interaction "Ask To Just Be Friends" and that gets rid of the romance and doesn't harm the friendship at all. (Ew. But I can tell you from my own "teen joined romantic convo and was suddenly a love interest" experience that it works!)
Or yes, you can use a mod to destroy the relationship. UI cheats will zero out the romance bar, but I think it'll always exist at 0, like Ask To Just Be Friends. MCCC you can destroy and recreate the relationship but you'll lose all your sentiments, etc.
It's awful. ☹️
I know, I just hate the fact that I have to ask my daughter to just be friends. its such an uncomfortable scenario i don't even want to fix it cuz that Love bar will always be there >.>
like "oh yeah, the love bar, that's from a super dark chapter, we don't talk about it 🙂"
