I do apologize if feels was wrong (it is possible your first reaction in spur of moment not the right one).
In case of her mistake, I like to compartmentalize the relationship, we fought because there is something I could not accept but our relationship should not become a hostage of small tiny issues.
In order to cool down the temperature, i changed the subject and start talking about other things, although she would have long face for while but things would become normal very fast.