history: I once called my girlfriend's mother mom by accident. We were only dating for a few months and I felt so awkward but she just laughed it off. I once called my girlfriend's mother mom by accident.
current: Haha, I'm sorry but I had a little laugh at that. It reminded me of the time I did that to my teacher in school. I was embarrassed, but it made me feel better to find out that it seems like it's a common thing that happens, since they're female authority figures that you can easily mix up.
next: Exactly, especially since we were only dating for a few months! I felt so awkward but she just laughed it off.