I have already given the specimen a chance before they have even done anything wrong. To my mind, they have already messed up simply because they have a strong potentiality to and I am just giving benefit of the doubt before the "betrayal" occurs. I am not betrayed often, but when it happens, it happens. And you know.
Depending on the specimen I give them the benefit of the doubt (e.g., familial, friendship, etc), in spite of already knowing I have a high possibility of being betrayed. Which is why the betrayal often occurs close to home and rarely by (strangers + more formal means) where any perceived possible betrayal never sees the light of day.
In my case, without tremendous detail, I was robbed by very close family member I trusted a large amount of money to (to be put to it's initial purpose, lied about it's whereabouts - then wasted it without remorse). I know, because the money was in my name, but instead, she attempted to steal it, and I will never be able to get it back (as she is not financially well off). It is not so much the money I am upset about, but the actions taken. The behavior was immoral, sociopathic, malicious, deceptive and intentional - she has ignored taking responsibility, and our relationship I feel is over at this point. There is nothing to reconcile - as she has the potentiality to cause harm without remorse/empathy/regard.
This isn't her first sketchy-behavior, but by far the worst. We had a solid, trustworthy foundation which is why I count it as betrayal. If you have never been "betrayed" then good. I wish it on no one.