My Sim was using the interaction when you talk badly about another Sim and now she has the Moodlet where she feels tense about talking badly about the Sim.
The Moodlet states it is due to the Loyal trait, which my Sim is shown not to have.
I have no mods installed and the following packs - Get to Work, Seasons, Eco Lifestyle, Outdoor Retreat, Dine Out, Romantic Garden, Backyard, Bowling Night, My First Pet, Tiny Living; the Blooming Rooms and Desert Luxe kits; and the Holiday Free Stuff.
Here is a cutting showing the Moodlet and the Traits.
