No, it's not that way, the interaction in itself never shows up.
Even though their romantic relationship is full, if another sim asks them they'll say they're single, because technically, they are.
Could you test the game without the mods folder in?
I tried, it ended up showing up like a lot of interactions I never saw before, I'll look into my mods and try to get away some of the interaction changing ones to see which one hides it
You can also try taking out half your mods/cc and test the game, and then keep splitting until you find everything that is causing issues.
