As others have said, if the other Director has chosen not to sack you due to the offense then I wouldn't really worry.

If there were 2 parties using threatening behaviour then in most cases you will both get a warning (fairly stern) and a cool off period. If I was you I'd stay well away from the other party as it could lead to more serious offenses. If he uses threatening behaviour towards you then just ignore it and report it.

IMO I'd have a word with the other Director and tell him exactly what has happened. If he presses charges then counter-act them saying he used the same behaviour yo you and threatening verbal abuse (if he has done?) before which pushed you into the unnapropriate behaviour.