When I have one, rarely... Mostly because, if she's arguing a valid point, I'm quick to admit defeat and apologize. If I know I'm right, I'll just agree anyways and walk away until she realizes I was right...
Edit: Apologized for something I did? None. Apologizes that someone was going through something, and I couldn't help? A couple ..
How many times have you been accused of cheating when you weren't, so they left only to find out later you didn't cheat?