If you have any type of interaction with people, there will be moments of crossed signals and disagreements. One of the key abilities to possess, especially in marriage, is the ability to humble yourself and repair incidents in relationships. An apology is supposed to be motivated by love for the other person.
2 Corinthians 7:10 For godly sorrow produces repentance leading to salvation, not to be regretted; but the sorrow of the world produces death.