Today, I accompanied my wife to register our niece for a children's dance class.

Unexpectedly, the teacher who was giving us the tour happened to be my ex-girlfriend.
My ex-girlfriend smiled throughout as she explained the course and showcased her teaching results.
She even tried out half a class with our niece and was very polite to us.
She didn't mention a single personal matter. I also pretended to be calm, listening to the class on the side,
not even changing my tone of voice, thinking I wouldn't reveal any flaws at all.
But on the way home, my wife casually said, "You probably slept with that dance teacher, huh?"
Hearing that, I couldn't help but furrow my brows.
It's been a whole afternoon now, and I still can't figure out what exactly went wrong.
Could it be that a woman's sixth sense is really that accurate?