A werewolf sim scared a werewolf ally by being in a rampage, somehow. Ever since then, 'smooth apology' has been regularly available. I don't know if that's truly the issue, but I have another theory:
Both sims have jealousy turned off. I enjoyed New Year's with these two sims, plus two other sims who also have no jealousy. I dropped a lot of pick-up lines for the New Years event between my three guests, so perhaps the game thinks that, since under default jealousy preferences that would've been cheating, my sim has something to apologise for? If so, I really don't like that it's counting that as a transgression.
Edit By Crinrict: Adjusted Title fit migrated bug report: [NEEDS SAVES] Smooth Apology Always Available | EA Forums - 11700561
Archived thread had around 8 me toos