The Last Straw
Sometimes feelings just build up inside of you and you’re unable to do anything about it until one day something triggers it and you snap. For this OP’s friend, the “snap” came at the rehearsal dinner when her fiancé got wasted and embarrassed her to the point that she just couldn’t take it anymore. She had had her doubts for a while but kept hoping that things would get better.
However, after this event, she knew she just couldn’t go ahead with the wedding, so she called her mom first thing in the morning and told her that it’s off. We can only imagine how difficult the whole thing must have been for everyone involved.