I don't think that making this mistake, ONCE, is a dealbreaker, provided Autumn follows it up IMMEDIATELY with a "that was a mistake; I don't want to mislead you, that can't happen again" boundary . . . and sticks to it.
Were it to happen twice, AFTER such a boundary statement were laid out after the first time, then I would suggest that you'd actuallbe be at "Square Minus-1," because you would have simply shown your husband what the easiest way to manipulate you is, and your so-called boundaries would then be laughed at, because he'd know you weren't serious about it.
DBing isn't complicated, but it DOES take a very strong amount of self-control. In fact, I have yet to see someone do it successfully without that all-important character trait.