My first reaction is that you seem like you were in a good place this morning. I think sometimes we are so full of anger and resentment that we can't see the gifts that are given us. Whenever I can be grateful for someone's kindness I feel like I am making progress.
However, I also see how others might be afraid that you will be "deceived" by a brief moment of what could very well be "quacking".
What happens to me is that my AH will be nice. I feel good. And then the next time he is his irrational self I am disappointed that he goes back to being his ranting, angry, blaming everyone but himself person.
You sound pretty realistic about what you need to do and what the worst case scenario is.
If you see the good in the action of your H without looking for an ulterior motive or believing it means more than what it is then I applaud you.