Texas has (maybe had?) an interesting traffic law – the last person who could avoid an accident was required to do so. This means, for example, that if someone runs a red light when you have a green, and you see them and don’t try to stop, you will be held partially liable. The real reason for the law, I suspect, is to keep folks from thinking they are okay as long as it is not your fault.
I would think it would be good to apply this principle in marriage. Be proactive in avoiding problems, even if the problem would be “her fault” not yours. Do all you can to avoid a misunderstanding, even if the fault would clearly be hers.