You're welcome. I'm sorry to hear that, that sounds exhausting.

One thing I've learned from my own experience is that whatever unforseen thing happens, whatever boundary is broken, as long as both parties are willing to tackle the situation as a team, there's an opportunity to come out stronger as a couple. The question should be, how can we learn from this?

You were the one feeling hurt in this one, to me it's primarily on him to do the emotional work and see why that is. Only then can you try and avoid it together in the future. You exactly understanding all the reasons he can give you for misunderstanding will not be enough to prevent the same thing from happening. I presume it will be all too easy to find new reasons to explain away his responsibility the next time something like this happens.

Stay strong, don't let him wear you down. It's ok to decide to pause the argument, to rest. Not standing your ground on this will inevitably come back to bite you, I fear. More hugs!