I admit, I may be over-identifying, but to me, it comes down to this: you said something to someone you ostensibly love that caused them distress. That you didn't intend to do so mitigates the offense,* but a simple, "I'm sorry. I didn't mean to upset you." costs you nothing.**

*Once. It does not mitigate repeatedly saying/doing things that you know upset someone, even if you think it's unreasonable/silly/overwrought of them to be upset.***
**I am talking about things like "jokes," comments on appearance, etc, not things like, "I believe fascism is bad." I'm failing on a word for the distinction, but I think y'all know what I mean.
***See "**."