Is this just my game or there's a little too much serenading lately? I think it's the only thing that my Sims with romantic relationship could do. At first that was sweet, but now it becomes annoying ...
I prefer the serenade add-on to this: Musical Autonomy Mods. It doesn't stop them altogether, just makes serenading more rare. The sim must have level 5 singing skill AND be creative, romantic or a music lover to serenade autonomously. The mod may need an update, though.